US3755182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrogen generating compositions
Assignee: MSA Safety Inc
•
Filing: 1972-01-27
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Granted: 1973-08-28
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Expires: 1992-01-27
Abstract
Abstract Compositions of sodium azide and polyvalent metal sulfates burn when ignited to produce nitrogen.
Inventors
- 👤 M Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:39
CPC Classifications
C; C06; C06B; C06B35/00; C01; C01B; C01B21/00; C01B21/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
13 words
A composition according to claim 1 in which the sulfate is calcium sulfate.
Claim 2
Dependent Claim
22 words
A composition according to claim 1 containing less than about 3 moles of sodium azide for each molecular equivalent of sulfate ion.
Claim 3
Dependent Claim
13 words
A composition according to claim 3 in which the sulfate is calcium sulfate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |