Patent US4127503A successfully refreshed from Google Patents.
US4127503A
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Oxygen absorbent
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1977-07-15
•
Granted: 1978-11-28
•
Expires: 1997-07-15
Abstract
Abstract An oxygen absorbent comprising a metal powder and a metal halide coated thereon is disclosed.
Inventors
- 👤 Yoshio Yoshikawa
- 👤 Akira Amemiya
- 👤 Toshio Komatsu
- 👤 Yoshiaki Inoue
- 👤 Megumu Yuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:22
CPC Classifications
B; B65; B65B; B65B55/00; B65B55/02; B65B55/12; B65B55/19; A; A23; A23B; A23B2/00; A23B2/70; A23B2/704; A23B2/708; A23B2/712; A23B2/717; B01; B01D; B01D53/00; B01D53/02; B01D53/34; B01D53/46
Claims Analysis
Total Claims: 58
Claim 1
Independent Claim
72 words
An oxygen absorbent in which at least one metal halide is coated on the surface of at least one metal powder, the amount of metal halide coated being in the range of from about 0.001 to about 10 parts by weight per 100 parts by weight of the metal powder, the water content of the absorbent being less than 1% by weight based on the basis of total weight of the absorbent.
Claim 2
Dependent Claim
72 words
An oxygen absorbent in which at least one metal halide is coated on the surface of at least one metal powder, the amount of metal halide coated being in the range of from about 0.001 to about 10 parts by weight per 100 parts by weight of the metal powder, the water content of the absorbent being less than 1% by weight based on the basis of total weight of the absorbent.
Claim 3
Dependent Claim
28 words
The oxygen absorbent as defined in claim 1 wherein the metal powder is selected from the group consisting of iron powder, zinc powder, copper powder and mixture thereof.
Claim 4
Dependent Claim
15 words
The oxygen absorbent as defined in claim 2 wherein the metal powder is iron powder.
Claim 5
Dependent Claim
25 words
The oxygen absorbent as defined in claim 1 wherein the metal constituting the metal halide is selected from lithium, sodium, potassium, magnesium, calcium and barium.
Claim 6
Dependent Claim
26 words
The oxygen absorbent as defined in claim 1 wherein the halide constituting the metal halide is selected from the group consisting of chloride, bromide and iodide.
Claim 7
Dependent Claim
13 words
The oxygen absorbent as defined in claim 5 wherein the halide is chloride.
Claim 8
Dependent Claim
39 words
The oxygen absorbent as defined in claim 1 wherein the amount of the metal halide coated is in the range of from about 0.01 to about 5 parts by weight per 100 parts by weight of the metal powder.
Claim 9
Dependent Claim
27 words
The oxygen absorbent as defined in claim 1 wherein the water content is less than 0.5% by weight on the basis of total weight of the absorbent.
Claim 10
Dependent Claim
27 words
The oxygen absorbent as defined in claim 1 wherein the water content is less than 0.2% by weight on the basis of total weight of the absorbent.
Claim 11
Dependent Claim
83 words
An oxygen absorbent in which at least one metal halide and at least one binder and/or at least one alkaline material are coated on the surface of at least one metal powder, the amount of the metal halide coated being in the range of from about 0.001 to about 10 parts by weight per 100 parts by weight of the metal powder, the water content of the absorbent being less than 1% by weight on the basis of total weight of the absorbent.
Claim 12
Dependent Claim
83 words
An oxygen absorbent in which at least one metal halide and at least one binder and/or at least one alkaline material are coated on the surface of at least one metal powder, the amount of the metal halide coated being in the range of from about 0.001 to about 10 parts by weight per 100 parts by weight of the metal powder, the water content of the absorbent being less than 1% by weight on the basis of total weight of the absorbent.
Claim 13
Dependent Claim
28 words
The oxygen absorbent as defined in claim 10 wherein the metal powder is selected from the group consisting of iron powder, zinc powder, copper powder and mixture thereof.
Claim 14
Dependent Claim
15 words
The oxygen absorbent as defined in claim 11 wherein the metal powder is iron powder.
Claim 15
Dependent Claim
25 words
The oxygen absorbent as defined in claim 10 wherein the metal constituting the metal halide is selected from lithium, sodium, potassium, magnesium, calcium and barium.
Claim 16
Dependent Claim
26 words
The oxygen absorbent as defined in claim 10 wherein the halide constituting the metal halide is selected from the group consisting of chloride, bromide and iodide.
Claim 17
Dependent Claim
13 words
The oxygen absorbent as defined in claim 14 wherein the halide is chloride.
Claim 18
Dependent Claim
39 words
The oxygen absorbent as defined in claim 10 wherein the amount of the metal halide coated is in the range of from about 0.01 to about 5 parts by weight per 100 parts by weight of the metal powder.
Claim 19
Dependent Claim
27 words
The oxygen absorbent as defined in claim 10 wherein the water content is less than 0.5% by weight on the basis of total weight of the absorbent.
Claim 20
Dependent Claim
27 words
The oxygen absorbent as defined in claim 10 wherein the water content is less than 0.2% by weight on the basis of total weight of the absorbent.
Claim 21
Dependent Claim
15 words
The oxygen absorbent as defined in claim 10 wherein the binder is water soluble polymer.
Claim 22
Dependent Claim
44 words
The oxygen absorbent as defined in claim 19 wherein the water soluble polymer is selected from the group consisting of sodium alginate, carboxymethyl cellulose, hydroxymethyl cellulose, methyl cellulose, ethyl cellulose, propyl cellulose, sodium carboxymethyl cellulose, starch, polyhydric alcohols, polyvinyl alcohol, saccharides and tragacanth gum.
Claim 23
Dependent Claim
39 words
The oxygen absorbent as defined in claim 10 wherein the amount of the binder coated is in the range of from about 0.01 part to about 10 parts by weight per 100 parts by weight of the metal powder.
Claim 24
Dependent Claim
40 words
The oxygen absorbent as defined in claim 10 wherein the alkaline material is selected from the group consisting of hydroxides, carbonates, sulfites, thiosulfates, dibasic phosphates, tribasic phosphates, polyphosphates, tripolyphosphates and organic acid salts of alkali metals or alkali earth metals.
Claim 25
Dependent Claim
15 words
The oxygen absorbent as defined in claim 10 wherein the alkaline material is magnesium hydroxide.
Claim 26
Dependent Claim
15 words
The oxygen absorbent as defined in claim 10 wherein the alkaline material is sodium thiosulfate.
Claim 27
Dependent Claim
40 words
The oxygen absorbent as defined in claim 10 wherein the amount of the alkaline material coated is in the range of from about 0.01 part to about 10 parts by weight per 100 parts by weight of the metal powder.
Claim 28
Dependent Claim
40 words
The oxygen absorbent as defined in claim 10 wherein the amount of the alkaline material coated is in the range of from about 0.1 part to about 2 parts by weight per 100 parts by weight of the metal powder.
Claim 29
Dependent Claim
91 words
A process for producing an oxygen absorbent, characterized by mixing at least one metal powder with a solution of at least one metal halide to coat metal halide on the surface of the metal powder, the amount of the metal halide coated being in the range of from about 0.001 part to about 10 parts by weight per 100 parts by weight of the metal powder, and then drying the coating until its water content amounts to less than 1% by weight on the basis of total weight of the absorbent.
Claim 30
Dependent Claim
91 words
A process for producing an oxygen absorbent, characterized by mixing at least one metal powder with a solution of at least one metal halide to coat metal halide on the surface of the metal powder, the amount of the metal halide coated being in the range of from about 0.001 part to about 10 parts by weight per 100 parts by weight of the metal powder, and then drying the coating until its water content amounts to less than 1% by weight on the basis of total weight of the absorbent.
Claim 31
Dependent Claim
27 words
The process as defined in claim 27 wherein the metal powder is selected from the group consisting of iron powder, zinc powder, copper powder and mixture thereof.
Claim 32
Dependent Claim
14 words
The process as defined in claim 28 wherein the metal powder is iron powder.
Claim 33
Dependent Claim
24 words
The process as defined in claim 27 wherein the metal constituting the metal halide is selected from lithium, sodium, potassium, magnesium, calcium and barium.
Claim 34
Dependent Claim
25 words
The process as defined in claim 27 wherein the halide constituting the metal halide is selected from the group consisting of chloride, bromide and iodide.
Claim 35
Dependent Claim
12 words
The process as defined in claim 31 wherein the halide is chloride.
Claim 36
Dependent Claim
38 words
The process as defined in claim 27 wherein the amount of the metal halide coated is in the range of from about 0.01 to about 5 parts by weight per 100 parts by weight of the metal powder.
Claim 37
Dependent Claim
17 words
The process as defined in claim 27 wherein the solution of the metal halide is aqueous solution.
Claim 38
Dependent Claim
26 words
The process as defined in claim 27 wherein the water content is less than 0.5% by weight on the basis of total weight of the absorbent.
Claim 39
Dependent Claim
26 words
The process as defined in claim 27 wherein the water content is less than 0.2% by weight on the basis of total weight of the absorbent.
Claim 40
Dependent Claim
107 words
A process for producing an oxygen absorbent, characterized by mixing at least one metal powder with at least one metal halide solution and at least binder and/or at least one alkaline material to coat the metal halide and the binder and/or the alkaline material on the surface of the metal powder, the amount of the metal halide coated being in the range of from about 0.001 part to about 10 parts by weight per 100 parts by weight of the metal powder, and then drying the coating until its water content amounts to less than 1% by weight on the basis of total weight of the absorbent.
Claim 41
Dependent Claim
107 words
A process for producing an oxygen absorbent, characterized by mixing at least one metal powder with at least one metal halide solution and at least binder and/or at least one alkaline material to coat the metal halide and the binder and/or the alkaline material on the surface of the metal powder, the amount of the metal halide coated being in the range of from about 0.001 part to about 10 parts by weight per 100 parts by weight of the metal powder, and then drying the coating until its water content amounts to less than 1% by weight on the basis of total weight of the absorbent.
Claim 42
Dependent Claim
27 words
The process as defined in claim 37 wherein the metal powder is selected from the group consisting of iron powder, zinc powder, copper powder and mixture thereof.
Claim 43
Dependent Claim
14 words
The process as defined in claim 38 wherein the metal powder is iron powder.
Claim 44
Dependent Claim
24 words
The process as defined in claim 37 wherein the metal constituting the metal halide is selected from lithium, sodium, potassium, magnesium, calcium and barium.
Claim 45
Dependent Claim
25 words
The process as defined in claim 37 wherein the halide constituting the metal halide is selected from the group consisting of chloride, bromide and iodide.
Claim 46
Dependent Claim
12 words
The process as defined in claim 41 wherein the halide is chloride.
Claim 47
Dependent Claim
38 words
The process as defined in claim 37 wherein the amount of the metal halide coated is in the range of from about 0.01 to about 5 parts by weight per 100 parts by weight of the metal powder.
Claim 48
Dependent Claim
15 words
The process as defined in claim 37 wherein the metal halide solution is aqueous solution.
Claim 49
Dependent Claim
26 words
The process as defined in claim 37 wherein the water content is less than 0.5% by weight on the basis of total weight of the absorbent.
Claim 50
Dependent Claim
26 words
The process as defined in claim 37 wherein the water content is less than 0.2% by weight on the basis of total weight of the absorbent.
Claim 51
Dependent Claim
14 words
The process as defined in claim 37 wherein the binder is water soluble polymer.
Claim 52
Dependent Claim
43 words
The process as defined in claim 37 wherein the water soluble polymer is selected from the group consisting of sodium alginate, carboxymethyl cellulose, hydroxymethyl cellulose, methyl cellulose, ethyl cellulose, propyl cellulose, sodium carboxymethyl cellulose, starch, polyhydric alcohols, polyvinyl alcohol, saccharides and tragacanth gum.
Claim 53
Dependent Claim
38 words
The process as defined in claim 37 wherein the amount of the binder coated is in the range of from about 0.01 part to about 10 parts by weight per 100 parts by weight of the metal powder.
Claim 54
Dependent Claim
39 words
The process as defined in claim 37 wherein the alkaline material is selected from the group consisting of hydroxides, carbonates, sulfites thiosulfates, dibasic phosphates, tribasic phosphates, polyphosphates, tripolyphosphates or organic acid salts of alkali metals or alkali earth metals.
Claim 55
Dependent Claim
14 words
The process as defined in claim 37 wherein the alkaline material is magnesium hydroxide.
Claim 56
Dependent Claim
14 words
The process as defined in claim 37 wherein the alkaline material is sodium thiosulfate.
Claim 57
Dependent Claim
39 words
The process as defined in claim 37 wherein the amount of the alkaline material coated is in the range of from about 0.01 part to about 10 parts by weight per 100 parts by weight of the metal powder.
Claim 58
Dependent Claim
39 words
The process as defined in claim 37 wherein the amount of the alkaline material coated is in the range of from about 0.1 part to about 2 parts by weight per 100 parts by weight of the metal powder.
References Cited (Backward Citations)
GB553991A
Cited
US2825651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |