Patent US4191057A successfully refreshed from Google Patents.
US2772952A
Expired / Lapsed
US
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Gas generator and method
Assignee: Individual
•
Filing: 1952-01-12
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Granted: 1956-12-04
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Expires: 1972-01-12
Abstract
No abstract record available.
Inventors
- 👤 John H Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:44
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1347954A
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US1356888A
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US1439103A
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US1574107A
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US1958913A
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US2012934A
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US2085584A
Cited
US2276690A
Cited
US2571336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |