US2926353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chuck and handle for manual installation of self-drilling expansion shells
Assignee: Phillips Drill Co Inc
•
Filing: 1958-04-21
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Granted: 1960-03-01
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Expires: 1978-04-21
Abstract
No abstract record available.
Inventors
- 👤 Frank A Werstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:06
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/14; B25; B25B; B25B27/00; B25D; B25D17/00; B25D17/005; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042; Y10T279/17051; Y10T279/17111; Y10T279/17957; Y10T279/17965; Y10T279/34; Y10T279/3481; Y10T279/35
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2829898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |