Patent US2528890A successfully refreshed from Google Patents.
US2528890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snow tractor
Assignee: Individual
•
Filing: 1947-10-22
•
Granted: 1950-11-07
•
Expires: 1967-10-22
Abstract
No abstract record available.
Inventors
- 👤 Robert A Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:34
CPC Classifications
B; B62; B62M; B62M27/00; B62M27/02; A; A63; A63C; A63C11/00; A63C11/10; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1353318A
Cited
US1530223A
Cited
US1602735A
Cited
CH118365A
Cited
US2289768A
Cited
US2253288A
Cited
US2392063A
Cited
US2440518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |