US2984307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting apparatus
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1957-09-27
•
Granted: 1961-05-16
•
Expires: 1977-09-27
Abstract
No abstract record available.
Inventors
- 👤 Charles H Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:15
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/02; E21B49/04; F; F42; F42B; F42B1/00; F42B1/02; F42B1/028; F42B3/00; F42B3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2344778A
Cited
GB645611A
Cited
FR999974A
Cited
US2587243A
Cited
US2587244A
Cited
US2699721A
Cited
US2506836A
Cited
FR986573A
Cited
US2757611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |