US3958997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of shaker molding and composition therefor
Assignee: Individual
•
Filing: 1971-07-21
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Granted: 1976-05-25
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Expires: 1991-07-21
Abstract
Abstract A mixture of water and a molding powder are shaken together in an assembly to form a smooth mixture. The molding powder includes an alkali metal alginate, calcium sulfate, tetrasodium pyrophosphate, and a filler. The mixture sets to form a jelly-like object which dries to form a rigid object of smaller size which is a substantially exact miniature of the jelly-like object.
Inventors
- 👤 Allen A. Greenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:32
CPC Classifications
B; B29; B29C; B29C39/00; B29C33/00; C; C08; C08K; C08K3/00; C08K3/30; C08K3/32; C08K3/34
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
A method of forming a molded object which comprises mixing together approximately 6 parts of water and one part of a molding powder consisting essentially of from 7 to 15 percent alkali metal alginate, an amount of calcium sulfate equal to 1.2 times the amount of alkali metal alginate, and 3/4 to 3 percent tetrasodium pyrophosphate, the remainder being a filler selected from the group consisting of diatomaceous earth, silica, magnesium carbonate, and kaolin, all parts and percentages being by weight, allowing the mixture to set and gel in a mold to form a jelly-like object, and drying the jelly-like object outside the mold to form a smaller rigid molded object.
Claim 2
Independent Claim
111 words
A method of forming a molded object which comprises mixing together approximately 6 parts of water and one part of a molding powder consisting essentially of from 7 to 15 percent alkali metal alginate, an amount of calcium sulfate equal to 1.2 times the amount of alkali metal alginate, and 3/4 to 3 percent tetrasodium pyrophosphate, the remainder being a filler selected from the group consisting of diatomaceous earth, silica, magnesium carbonate, and kaolin, all parts and percentages being by weight, allowing the mixture to set and gel in a mold to form a jelly-like object, and drying the jelly-like object outside the mold to form a smaller rigid molded object.
Claim 3
Dependent Claim
19 words
A method as in claim 1 wherein the alkali metal alginate is approximately 10 percent of the molding powder.
Claim 4
Independent Claim
99 words
A method of forming a molded object which comprises mixing together approximately 6 parts of water and one part of a molding powder consisting essentially of from 7 to 15 percent alkali metal alginate, an amount of calcium sulfate equal to 1.2 times the amount of alkali metal alginate, and 3/4 to 3 percent tetrasodium pyrophosphate, the remainder being an inert filler, all parts and percentages being by weight, allowing the mixture to set and gel in a mold to form a jelly-like object, and drying the jelly-like object outside the mold to form a smaller rigid molded object.
Claim 5
Independent Claim
99 words
A method of forming a molded object which comprises mixing together approximately 6 parts of water and one part of a molding powder consisting essentially of from 7 to 15 percent alkali metal alginate, an amount of calcium sulfate equal to 1.2 times the amount of alkali metal alginate, and 3/4 to 3 percent tetrasodium pyrophosphate, the remainder being an inert filler, all parts and percentages being by weight, allowing the mixture to set and gel in a mold to form a jelly-like object, and drying the jelly-like object outside the mold to form a smaller rigid molded object.
Claim 6
Dependent Claim
12 words
A method as in claim 3 wherein the filler is diatomaceous earth.
Claim 7
Dependent Claim
58 words
A molding powder consisting essentially of 7 to 15 percent alkali metal alginate, an amount of calcium sulfate equal to 1.2 times the amount of alkali metal alginate, and 3/4 to 3 percent tetrasodium pyrophosphate, the remainder being a filler selected from the group consisting of diatomaceous earth, silica, magnesium carbonate, and kaolin, all percentages being by weight.
Claim 8
Dependent Claim
58 words
A molding powder consisting essentially of 7 to 15 percent alkali metal alginate, an amount of calcium sulfate equal to 1.2 times the amount of alkali metal alginate, and 3/4 to 3 percent tetrasodium pyrophosphate, the remainder being a filler selected from the group consisting of diatomaceous earth, silica, magnesium carbonate, and kaolin, all percentages being by weight.
Claim 9
Dependent Claim
46 words
A molding powder consisting essentially of 7 to 15 percent alakli metal alginate, an amount of calcium sulfate equal to 1.2 times the amount of alkali metal alginate, and 3/4 to 3 percent tetrasodium pyrophosphate, the remainder being an inert filler, all percentages being by weight.
Claim 10
Dependent Claim
46 words
A molding powder consisting essentially of 7 to 15 percent alakli metal alginate, an amount of calcium sulfate equal to 1.2 times the amount of alkali metal alginate, and 3/4 to 3 percent tetrasodium pyrophosphate, the remainder being an inert filler, all percentages being by weight.
Claim 11
Dependent Claim
18 words
A molding powder as in claim 5 wherein the percentage of alkali metal alginate is approximately 10 percent.
Claim 12
Dependent Claim
17 words
A molding powder as in claim 7 wherein the percentage of tetrasodium pyrophosphate is approximately 3/4 percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |