US2918290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chuck and adapter for self-drilling expansion shells
Assignee: Individual
•
Filing: 1957-09-03
•
Granted: 1959-12-22
•
Expires: 1977-09-03
Abstract
No abstract record available.
Inventors
- 👤 Frank A Werstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:26
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/005; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042; Y10T279/17957; Y10T279/17965; Y10T279/34; Y10T279/3406; Y10T279/3418
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1325982A
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US1138877A
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US1775917A
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US1863107A
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US2425988A
Cited
US2556263A
Cited
US2805073A
Cited
US2767988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |