US3457992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater tubing head
Assignee: Atlantic Richfield Co
•
Filing: 1966-12-14
•
Granted: 1969-07-29
•
Expires: 1986-12-14
Abstract
No abstract record available.
Inventors
- 👤 Cicero C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:53
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/047; E21B33/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2035834A
Cited
US3248132A
Cited
US3268242A
Cited
US3273915A
Cited
US3288493A
Cited
US3353596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |