US2512744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well valve
Assignee: Individual
•
Filing: 1947-06-13
•
Granted: 1950-06-27
•
Expires: 1967-06-13
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:47
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US992027A
Cited
US998400A
Cited
US1641921A
Cited
US1692302A
Cited
US1788763A
Cited
US1802732A
Cited
US1963683A
Cited
US2052939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |