US2681701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical igniter
Assignee: Services Petroliers Schlumberger SA
•
Filing: 1949-11-19
•
Granted: 1954-06-22
•
Expires: 1969-11-19
Abstract
No abstract record available.
Inventors
- 👤 Schlumberger Marcel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:47
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; F42B3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US319629A
Cited
US389448A
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FR502474A
Cited
US2155322A
Cited
US2216145A
Cited
US2216151A
Cited
US2296971A
Cited
US2452892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |