Patent US3049033A successfully refreshed from Google Patents.
US3049033A
Expired / Lapsed
US
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Spade drill and grinding fixture therefor
Assignee: Erickson Tool Co
•
Filing: 1959-05-20
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Granted: 1962-08-14
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Expires: 1979-05-20
Abstract
No abstract record available.
Inventors
- 👤 Milton L Benjamin
- 👤 Elmer L J Syrene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:57
CPC Classifications
B; B24; B24B; B24B41/00; B24B41/06; B24B41/066; B23; B23B; B23B51/00; B23B51/0002; B23B51/0003; B23B51/00035; B23B51/06; B23B51/068; B23B51/0684; B23B2251/00; B23B2251/48; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455; Y10T408/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1746046A
Cited
CH230307A
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US2400856A
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US2418021A
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US2730849A
Cited
US2816464A
Cited
US2817983A
Cited
US2936658A
Cited
US2859569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |