Patent US2613006A successfully refreshed from Google Patents.
US2613006A
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US
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Shovel attachment for crawler tractors
Assignee: Individual
•
Filing: 1949-08-20
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Granted: 1952-10-07
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Expires: 1969-08-20
Abstract
No abstract record available.
Inventors
- 👤 Shirrell F Bradford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:20
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/34; E02F3/342
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |