US3383670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke and heat detection unit
Assignee: Individual
•
Filing: 1964-07-13
•
Granted: 1968-05-14
•
Expires: 1984-07-13
Abstract
No abstract record available.
Inventors
- 👤 Gordon A Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:25
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/10; G08B17/103; G08B17/107; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; G01N21/53; G08B17/11; G08B17/113
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2033466A
Cited
US2537028A
Cited
GB625731A
Cited
US2476958A
Cited
US2684008A
Cited
US2593616A
Cited
US2654242A
Cited
US3231748A
Cited
US3222662A
Cited
US3185975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |