Patent US1637129A successfully refreshed from Google Patents.
Patent US2612142A successfully refreshed from Google Patents.
US2612142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump jack valve control mechanism
Assignee: Individual
•
Filing: 1949-04-23
•
Granted: 1952-09-30
•
Expires: 1969-04-23
Abstract
No abstract record available.
Inventors
- 👤 Samuel V Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:18
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; F04B47/04; Y; Y10; Y10S; Y10S417/00; Y10S417/904
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE305252C
Cited
FR562144A
Cited
US1696044A
Cited
US2276358A
Cited
US2292331A
Cited
US2347302A
Cited
US2355669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |