US2746218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylindrical grinding attachment for surface grinders
Assignee: FRANK W BOWIE
•
Filing: 1953-03-24
•
Granted: 1956-05-22
•
Expires: 1973-03-24
Abstract
No abstract record available.
Inventors
- 👤 Frank W Bowie
- 👤 Edward N Sturdevant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:35
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/02; B24B5/14; Y; Y10; Y10T; Y10T82/00; Y10T82/25; Y10T82/2564
Claims Analysis
Total Claims: 0
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US2428248A
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US2527778A
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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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |