US2027104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic device for oil well pumping
Assignee: Individual
•
Filing: 1931-06-29
•
Granted: 1936-01-07
•
Expires: 1951-06-29
Abstract
No abstract record available.
Inventors
- 👤 Kahr Martin
- 👤 John S Kahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:30
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/02; Y; Y10; Y10S; Y10S417/00; Y10S417/904; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/1508; Y10T74/1518; Y10T74/1519; Y10T74/1521; Y10T74/18; Y10T74/18056; Y10T74/18248; Y10T74/18296
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-01-06 | 1939-07-08 | 1940-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-01-06 | 1943-07-08 | 1944-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-01-06 | 1947-07-08 | 1948-01-07 | $7700.00 | Window Closed / Lapsed |