Patent US1937839A successfully refreshed from Google Patents.
US1937839A
Expired / Lapsed
US
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Tractor
Assignee: Individual
•
Filing: 1930-09-13
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Granted: 1933-12-05
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Expires: 1950-09-13
Abstract
No abstract record available.
Inventors
- 👤 Parrett Dent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:25
CPC Classifications
B; B60; B60B; B60B35/00; B60B35/02; B60B35/10; B60B35/1009; B60B35/1027; B60B35/1072; B60B35/109; B60B35/12; B60B35/16; B60B35/163; B60K; B60K17/00; B60K17/04; B60K17/16; B60K17/165; B60B2310/00; B60B2310/30; B60B2310/305; B60B2310/306; B60B2360/00; B60B2360/14; B60B2360/147; B60B2380/00; B60B2380/10; B60B2380/14; B60Y; B60Y2200/00; B60Y2200/20; B60Y2200/22; B60Y2200/221; B60Y2200/40; B60Y2200/43; F; F16; F16H; F16H48/00; F16H48/06; F16H48/08; Y; Y10; Y10S; Y10S180/00; Y10S180/906; Y10T; Y10T74/00; Y10T74/21; Y10T74/219; Y10T74/2191
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) | 1936-12-04 | 1937-06-05 | 1937-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-12-04 | 1941-06-05 | 1941-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-12-04 | 1945-06-05 | 1945-12-05 | $7700.00 | Window Closed / Lapsed |