Patent US2554556A successfully refreshed from Google Patents.
US2554556A
Expired / Lapsed
US
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Agricultural tractor and coupling device therefor
Assignee: Individual
•
Filing: 1945-02-28
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Granted: 1951-05-29
•
Expires: 1965-02-28
Abstract
No abstract record available.
Inventors
- 👤 Bobard Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:39
CPC Classifications
B; B62; B62D; B62D49/00; B62D49/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1306483A
Cited
US1210055A
Cited
US1105731A
Cited
US1105551A
Cited
GB191419738A
Cited
GB191424170A
Cited
FR641079A
Cited
CH195206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |