US2639674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well pump cleaner
Assignee: FILLMORE IMPROVEMENT Co
•
Filing: 1949-06-13
•
Granted: 1953-05-26
•
Expires: 1969-06-13
Abstract
No abstract record available.
Inventors
- 👤 Ray H Reese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:19
CPC Classifications
E; E21; E21B; E21B37/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US436889A
Cited
US1016106A
Cited
US1338906A
Cited
US1474718A
Cited
US1930839A
Cited
US2300348A
Cited
US2394189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |