US1854436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive coupling for pump jacks
Assignee: John Deere Tractor Co
•
Filing: 1926-10-07
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Granted: 1932-04-19
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Expires: 1946-10-07
Abstract
No abstract record available.
Inventors
- 👤 Louis W Witry
- 👤 John E Cade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:42
CPC Classifications
F; F04; F04B; F04B17/00; F04B17/03; F04B17/04
Claims Analysis
Total Claims: 0
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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) | 1935-04-19 | 1935-10-19 | 1936-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-04-19 | 1939-10-19 | 1940-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-04-19 | 1943-10-19 | 1944-04-19 | $7700.00 | Window Closed / Lapsed |