Patent US3103752A successfully refreshed from Google Patents.
US3103752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting blade for excavator
Assignee: Allis Chalmers Corp
•
Filing: 1961-04-10
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Granted: 1963-09-17
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Expires: 1981-04-10
Abstract
No abstract record available.
Inventors
- 👤 Harvey W Rockwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:17
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US969469A
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US1419524A
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US1765218A
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US2015109A
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US2074081A
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US2349576A
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DE807036C
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US2722065A
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US2778129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-16 | 1967-03-18 | 1967-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-16 | 1971-03-18 | 1971-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-16 | 1975-03-18 | 1975-09-17 | $7700.00 | Window Closed / Lapsed |