Patent US2667929A successfully refreshed from Google Patents.
US2667929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wiper for strings engaged in wells
Assignee: Individual
•
Filing: 1948-12-10
•
Granted: 1954-02-02
•
Expires: 1968-12-10
Abstract
No abstract record available.
Inventors
- 👤 Gerald R Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:59
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US993507A
Cited
US1437755A
Cited
US1641921A
Cited
US1573031A
Cited
US1773137A
Cited
US2061094A
Cited
US2215377A
Cited
US2272395A
Cited
US2222191A
Cited
US2239159A
Cited
US2328127A
Cited
US2480371A
Cited
US2444653A
Cited
US2440571A
Cited
US3385713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |