US2764121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas alarm device
Assignee: Individual
•
Filing: 1954-02-15
•
Granted: 1956-09-25
•
Expires: 1974-02-15
Abstract
No abstract record available.
Inventors
- 👤 Paul J Showstack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:09
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2034179A
Cited
US999567A
Cited
US2211142A
Cited
US2522207A
Cited
US2498193A
Cited
US2506983A
Cited
US2682855A
Cited
US2649752A
Cited
US2729187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |