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US2819629A
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US
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Method of making shanks for auger bits and the like
Assignee: IRWIN AUGER BIT Co
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Filing: 1954-02-05
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Granted: 1958-01-14
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Expires: 1974-02-05
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:01
CPC Classifications
B; B21; B21K; B21K5/00; B21K5/02; B21K5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1209362A
Cited
US1556655A
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US2029447A
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US2453000A
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US2627292A
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US2543206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |