US2981938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined overheat and flame detector system
Assignee: PETCAR RES CORP
•
Filing: 1955-12-21
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Granted: 1961-04-25
•
Expires: 1975-12-21
Abstract
No abstract record available.
Inventors
- 👤 Robert E Carbauh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:39
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/14; F23N5/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2477348A
Cited
US2236891A
Cited
US2659067A
Cited
US2709799A
Cited
US2804608A
Cited
US2946989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |