US2994859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame detecting apparatus
Assignee: Specialties Development Corp
•
Filing: 1956-06-15
•
Granted: 1961-08-01
•
Expires: 1976-06-15
Abstract
No abstract record available.
Inventors
- 👤 Klein Clifford John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:53
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F23N2229/00; F23N2229/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2749515A
Cited
US2811711A
Cited
US2749447A
Cited
US2820945A
Cited
US2804608A
Cited
US2722677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |