Patent US2667795A successfully refreshed from Google Patents.
US2667795A
Expired / Lapsed
US
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Counterbore attachment
Assignee: ROBERT F WALKER
•
Filing: 1948-02-07
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Granted: 1954-02-02
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Expires: 1968-02-07
Abstract
No abstract record available.
Inventors
- 👤 Bradford T Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:22
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B51/108; B23B51/1085; B23B51/109; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/905; Y10T408/906; Y10T408/909; Y10T408/9098; Y10T408/90993
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) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |