US3500368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic ionic fire alarm system
Assignee: Nittan Co Ltd
•
Filing: 1966-08-18
•
Granted: 1970-03-10
•
Expires: 1986-08-18
Abstract
No abstract record available.
Inventors
- 👤 Nagao Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:41
CPC Classifications
G; G01; G01T; G01T7/00; G01T7/12; G01T7/125; G08; G08B; G08B17/00; G08B17/10; 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)
US2646556A
Cited
US2702898A
Cited
US3271756A
Cited
US3078450A
Cited
US3301307A
Cited
US3310724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |