US2513283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric convection smoke detector
Assignee: CO Two Fire Equipment Co
•
Filing: 1946-09-28
•
Granted: 1950-07-04
•
Expires: 1966-09-28
Abstract
No abstract record available.
Inventors
- 👤 Cahusac Clarence Noel
- 👤 Donald A Diehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:00
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; G01N21/53; G01N21/534
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1877501A
Cited
US1256740A
Cited
US1546264A
Cited
US1739373A
Cited
US1828894A
Cited
US1834905A
Cited
US2089014A
Cited
US1937722A
Cited
GB394853A
Cited
GB405937A
Cited
US2140368A
Cited
US2298757A
Cited
US2301367A
Cited
US2427013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |