Patent US3412290A successfully refreshed from Google Patents.
US3412290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature stabilization of thermal igniters for oil burners
Assignee: Ricardo PLC
•
Filing: 1966-10-07
•
Granted: 1968-11-19
•
Expires: 1986-10-07
Abstract
No abstract record available.
Inventors
- 👤 John G G Hempson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:07
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/04; G05F3/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2575113A
Cited
US3325689A
Cited
US2487754A
Cited
US2605380A
Cited
US2747143A
Cited
US2933653A
Cited
US3017540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |