US2676790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock bit
Assignee: TURNER BITS Inc
•
Filing: 1948-11-10
•
Granted: 1954-04-27
•
Expires: 1968-11-10
Abstract
No abstract record available.
Inventors
- 👤 Morris F Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:49
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/20; E21B10/22; F; F16; F16C; F16C43/00; F16C43/04; F16C43/06; F16C2352/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1729063A
Cited
US1896231A
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US1905079A
Cited
US1999447A
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US2004013A
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US2009299A
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US2104819A
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US2061933A
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US2075997A
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US2094856A
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US2126035A
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US2168640A
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US2190365A
Cited
US2174102A
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US2187037A
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US2334359A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |