US2463169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment for tractors
Assignee: Individual
•
Filing: 1945-08-22
•
Granted: 1949-03-01
•
Expires: 1965-08-22
Abstract
No abstract record available.
Inventors
- 👤 Dan C Grewe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:59
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7622; E02F3/7627
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1082959A
Cited
US1713030A
Cited
US1775314A
Cited
US1763534A
Cited
US2346757A
Cited
US2370830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |