US3666672A
Expired / Lapsed
US
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Hydrogen generating compositions
Assignee: MSA Safety Inc
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Filing: 1969-12-24
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Granted: 1972-05-30
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Expires: 1989-12-24
Abstract
Abstract An autogeneously combustible composition that liberates hydrogen on burning contains an alkali metal borohydride and a hydrazine sulfate in proportions such that there are between about 0.5 to 2 boron atoms for each nitrogen atom.
Inventors
- 👤 Ralph H Hiltz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:32
CPC Classifications
C; C01; C01B; C01B3/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
21 words
A composition according to claim 1 in which there is between about 1 and 1.25 boron atoms for each nitrogen atom.
Claim 2
Dependent Claim
13 words
A composition according to claim 1 in which the borohydride is sodium borohydride.
Claim 3
Dependent Claim
14 words
A composition according to claim 1 in which the hydrogen sulfate is dihydrazine sulfate.
Claim 4
Dependent Claim
14 words
A composition according to claim 2 consisting essentially of sodium borohydride and dihydrazine sulfate.
Claim 5
Independent Claim
46 words
A method of generating hydrogen comprising the step of igniting a coherent compact consisting essentially of an intimate mixture of finely divided alkali metal borohydride and hydrazine sulfate, the proportions being such that there is between about 0.5 and 2 boron atoms for each nitrogen atom.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |