US2766440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame detector
Assignee: Phillips Petroleum Co
•
Filing: 1951-12-10
•
Granted: 1956-10-09
•
Expires: 1971-12-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Ross S Marsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:33
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2477348A
Cited
FR368882A
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GB190657A
Cited
US1773826A
Cited
US2127977A
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US2316872A
Cited
US2455351A
Cited
US2413125A
Cited
US2523017A
Cited
US2487526A
Cited
US2586252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |