Patent US2989295A successfully refreshed from Google Patents.
US2989295A
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Cutter bit and holders and alignment means therefor
Assignee: FRANK PROX CO Inc
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Filing: 1958-06-16
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Granted: 1961-06-20
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Expires: 1978-06-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert F Prox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:03
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/18; E21C35/19; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17957; Y10T279/17965
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1542007A
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DE550924C
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GB422294A
Cited
US2513586A
Cited
US2434256A
Cited
US2907559A
Cited
US2860863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |