Patent US2241735A successfully refreshed from Google Patents.
US2241735A
Expired / Lapsed
US
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Process and apparatus for finishing valve seats and the like
Assignee: Penn Electric Switch Co
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Filing: 1939-05-22
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Granted: 1941-05-13
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Expires: 1959-05-22
Abstract
No abstract record available.
Inventors
- 👤 Wilbert W Redsecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:13
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/16; F02M61/18; B; B24; B24B; B24B39/00; B24B39/02; F02M61/168; Y; Y10; Y10S; Y10S29/00; Y10S29/049; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49306
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-05-12 | 1944-11-11 | 1945-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-05-12 | 1948-11-11 | 1949-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-05-12 | 1952-11-11 | 1953-05-13 | $7700.00 | Window Closed / Lapsed |