US2503889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankpin grinding machine
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1947-02-28
•
Granted: 1950-04-11
•
Expires: 1967-02-28
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Silven
- 👤 Don R Percival
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:49
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/36; B24B5/42; Y; Y10; Y10S; Y10S29/00; Y10S29/057; Y10S29/093; Y10T; Y10T74/00; Y10T74/14; Y10T74/1418; Y10T74/1424; Y10T74/1453
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |