US2000239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slitting fixture for piston rings
Assignee: PERFECT CIRCLE Co
•
Filing: 1929-10-11
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Granted: 1935-05-07
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Expires: 1949-10-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Linn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:52
CPC Classifications
B; B23; B23D; B23D45/00; B23D45/003; B23D45/10; B23D47/00; B23D47/04; Y; Y10; Y10S; Y10S409/00; Y10S409/903; Y10T; Y10T29/00; Y10T29/51; Y10T29/5104; Y10T29/5109; Y10T29/5111
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) | 1938-05-06 | 1938-11-05 | 1939-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-06 | 1942-11-05 | 1943-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-06 | 1946-11-05 | 1947-05-07 | $7700.00 | Window Closed / Lapsed |