US2637276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for hydraulic pumping
Assignee: DRESSER EQUIPMENT Co
•
Filing: 1947-05-10
•
Granted: 1953-05-05
•
Expires: 1967-05-10
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Coberly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:43
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; F04B47/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1656136A
Cited
DE356931C
Cited
US2046588A
Cited
US2119736A
Cited
US2005995A
Cited
US2230787A
Cited
US2152802A
Cited
US2208554A
Cited
US2266356A
Cited
US2333857A
Cited
US2277746A
Cited
US2385316A
Cited
US2423111A
Cited
US2435179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |