Patent US4649895A successfully refreshed from Google Patents.
US4649895A
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US
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Exothermic composition
Assignee: Kiribai Chemical Industry Co
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Filing: 1986-03-31
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Granted: 1987-03-17
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Expires: 2006-03-31
Abstract
Abstract Exothermic compositions which contain iron powders treated with sulfur-containing compounds as agents to be oxydized and mugwort leaf dry powders as a part of water holding agents. According to the compositions there are provided body warmers having an excellent initial heat generation, water holding capacity, and handling property.
Inventors
- 👤 Ryuichi Yasuki
- 👤 Toshitsugu Sahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:33
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F7/03; A61F7/032; A61F7/034; C; C09; C09K; C09K5/00; C09K5/16; F; F24; F24V; F24V30/00; A61F2007/036; A61F2007/038
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
53 words
In exothermic compositions comprising iron powders, neutral metal salts, water, and water holding agents, the improvement which comprises that iron powders treated with sulfur-containing compounds are employed as the iron powders and that dry powders of mugwort leaves from which veins are removed are employed as a part of the water holding agents.
Claim 2
Dependent Claim
53 words
In exothermic compositions comprising iron powders, neutral metal salts, water, and water holding agents, the improvement which comprises that iron powders treated with sulfur-containing compounds are employed as the iron powders and that dry powders of mugwort leaves from which veins are removed are employed as a part of the water holding agents.
Claim 3
Dependent Claim
13 words
The compositions of claim 1, wherein the sulfur-containing compounds are organic sulfur-containing compounds.
Claim 4
Dependent Claim
13 words
The compositions of claim 1, wherein the sulfur-containing compounds are inorganic sulfur-containing compounds.
Claim 5
Dependent Claim
12 words
The compositions of claim 1, wherein the sulfur-containing compounds are simple sulfur.
Claim 6
Dependent Claim
14 words
The compositions of claim 1, wherein the sulfur-containing compounds are sulfur- and nitrogen-containing compounds.
Claim 7
Dependent Claim
52 words
The compositions of claim 1, wherein the water holding agents are mixtures of the mugwort leaf dry powders and at least one member selected from the group consisting of wood powder, coconut husk charcoal powder, silica gel powder, vermiculite powder, pearlite powder, polyurethane foam powder, asbestos powder and water absorbing resin powder.
Claim 8
Dependent Claim
10 words
The composition of claim 1, which further comprises oxidation catalysts.
Claim 9
Dependent Claim
75 words
The compositions of claim 7, wherein the composition comprises: 100parts by weight of the iron powders treated with the sulfur-containing compounds, 1 to 20 parts by weight of the neutral metal salts, 0.1 to 80 parts by weight of the oxidation catalysts, 1 to 500 parts by weight of the water holding agents which contains 5 to 55% by weight of the mugwort leaf dry powder, and 20 to 70 parts by weight of water.
References Cited (Backward Citations)
US3976049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |