US4255157A
Expired / Lapsed
US
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Thermogenic compositions
Assignee: Artience Co Ltd
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Filing: 1979-09-18
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Granted: 1981-03-10
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Expires: 1999-09-18
Abstract
Abstract A thermogenic composition comprising (1) at least one of alkali metal sulphides, polysulphides and hydrates thereof, (2) at least one of carbonaceous materials, (3) at least one of powdered iron, magnesium, aluminum and powdered alloys of these metals and, if desired, calcium oxide, the thermogenic composition being capable of heat generation when contacted with air or oxygen.
Inventors
- 👤 Denjirou Yamaguchi
- 👤 Noboru Mogi
- 👤 Toshio Seta
- 👤 Kunizo Oishi
- 👤 Yoshihisa Fuzimori
- 👤 Atsushi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:01
CPC Classifications
C; C10; C10L; C10L5/00; C10L5/40; Y; Y02; Y02E; Y02E50/00; Y02E50/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
67 words
A thermogenic composition capable of heat generation by contact with air or oxygen, which comprises: (A) at least one component selected from the group consisting of alkali metal sulphides, polysulphides and hydrates thereof, (B) at least one component selected from the group consisting of carbonaceous materials and (C) at least one component selected from the group consisting of powdered iron, magnesium, aluminum and alloys of these metals.
Claim 2
Dependent Claim
67 words
A thermogenic composition capable of heat generation by contact with air or oxygen, which comprises: (A) at least one component selected from the group consisting of alkali metal sulphides, polysulphides and hydrates thereof, (B) at least one component selected from the group consisting of carbonaceous materials and (C) at least one component selected from the group consisting of powdered iron, magnesium, aluminum and alloys of these metals.
Claim 3
Dependent Claim
13 words
A thermogenic composition according to claim 1, which further comprises calcium oxide (D).
Claim 4
Dependent Claim
20 words
A thermogenic composition according to claim 1 or 2, wherein the alkali metal is lithium, sodium, potassium, rubidium or cesium.
Claim 5
Dependent Claim
22 words
A thermogenic composition according to claim 1 or 2, wherein the carbonaceous material is activated carbon, charcoal, carbon black, graphite or soot.
Claim 6
Dependent Claim
20 words
A thermogenic composition according to claim 3, wherein the carbonaceous material is activated carbon, charcoal, carbon black, graphite or soot.
Claim 7
Dependent Claim
35 words
A thermogenic composition according to claim 1 or 2, wherein the components (A), (B) and (C) are present respectively in amounts by weight of 5-50%, 5-50% and 15-60% of the composition, the amounts totalling 100%.
Claim 8
Dependent Claim
32 words
A thermogenic composition according to claim 2, wherein the components (A), (B), (C) and (D) are present respectively in amounts by weight of 5-50%, 5-50%, 15-60% and 10-70%, the amounts totalling 100%.
References Cited (Backward Citations)
US4093424A
Cited
US4114591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |