Patent US2600244A successfully refreshed from Google Patents.
US2600244A
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US
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Blade coupling attachment for tractors
Assignee: Individual
•
Filing: 1947-10-03
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Granted: 1952-06-10
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Expires: 1967-10-03
Abstract
No abstract record available.
Inventors
- 👤 Ray J Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:56
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/02; A01B63/023; A01B59/00; A01B59/04; A01B59/048
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1170578A
Cited
US1692750A
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US1788698A
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US1861731A
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US2307655A
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US2426410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |