US2047155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wind propelled tractor
Assignee: Individual
•
Filing: 1935-01-17
•
Granted: 1936-07-07
•
Expires: 1955-01-17
Abstract
No abstract record available.
Inventors
- 👤 Carl A Rettman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:57
CPC Classifications
F; F03; F03D; F03D13/00; F03D13/20; F03D13/22; F03D9/00; F03D9/30; F03D9/32; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72; Y02E10/728; Y10; Y10S; Y10S416/00; Y10S416/06
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) | 1939-07-07 | 1940-01-06 | 1940-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-07 | 1944-01-06 | 1944-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-07 | 1948-01-06 | 1948-07-07 | $7700.00 | Window Closed / Lapsed |