Patent US2634813A successfully refreshed from Google Patents.
US2634813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple wire scratcher for wells
Assignee: Individual
•
Filing: 1948-08-14
•
Granted: 1953-04-14
•
Expires: 1968-08-14
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:13
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1103596A
Cited
US1371425A
Cited
US1342618A
Cited
US1572769A
Cited
US1758995A
Cited
US1775376A
Cited
US1914533A
Cited
US2151416A
Cited
US2215514A
Cited
US2190145A
Cited
US2374317A
Cited
US2392144A
Cited
US2412876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |