Patent US2311851A successfully refreshed from Google Patents.
US3032111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subsurface safety valve
Assignee: Jersey Production Research Co
•
Filing: 1960-08-31
•
Granted: 1962-05-01
•
Expires: 1980-08-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles B Corley
- 👤 Iii Samuel E Loy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:29
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/066; E21B34/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2033563A
Cited
US2278532A
Cited
US2253537A
Cited
US2328840A
Cited
US2697988A
Cited
US2859826A
Cited
US2856003A
Cited
US2842212A
Cited
US2897896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |