Patent US2808637A successfully refreshed from Google Patents.
US2808637A
Expired / Lapsed
US
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Pyramidal tool and holder
Assignee: Individual
•
Filing: 1953-11-23
•
Granted: 1957-10-08
•
Expires: 1973-11-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:42
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/16; B23B27/22; Y; Y10; Y10T; Y10T407/00; Y10T407/11; Y10T407/112; Y10T407/22; Y10T407/2222; Y10T407/2238; Y10T407/224; Y10T407/2242; Y10T407/23
Claims Analysis
Total Claims: 0
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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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |