US3386515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well completion apparatus
Assignee: Dresser Industries Inc
•
Filing: 1965-12-03
•
Granted: 1968-06-04
•
Expires: 1985-12-03
Abstract
No abstract record available.
Inventors
- 👤 Morgan L Crow
- 👤 Joe D Foster
- 👤 Marion D Kilgore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:05
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/1208; E21B33/129; E21B33/1295; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2834415A
Cited
US2899218A
Cited
US2275935A
Cited
US2352423A
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US3181614A
Cited
US3191682A
Cited
US3330357A
Cited
US3329214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |