US2766013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill guide
Assignee: Individual
•
Filing: 1952-02-06
•
Granted: 1956-10-09
•
Expires: 1972-02-06
Abstract
No abstract record available.
Inventors
- 👤 George A Hertzke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:53
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1078; E21B17/02; E21B17/04; E21B17/042; E21B17/043; E21B7/00; E21B7/04; E21B7/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US790330A
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US1204805A
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US1848762A
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US2090822A
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US2177300A
Cited
US2454771A
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US2519861A
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US2588782A
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US2589534A
Cited
US2602639A
Cited
US2542725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |