US1695787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making piston rings
Assignee: WILLIAMS ALLOY PRODUCTS Co
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Filing: 1925-02-28
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Granted: 1928-12-18
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Expires: 1945-02-28
Abstract
No abstract record available.
Inventors
- 👤 Edward M Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:50
CPC Classifications
B; B23; B23P; B23P9/00; B23P9/04; Y; Y10; Y10S; Y10S29/00; Y10S29/049; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T29/49275
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) | 1931-12-18 | 1932-06-18 | 1932-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-12-18 | 1936-06-18 | 1936-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-12-18 | 1940-06-18 | 1940-12-18 | $7700.00 | Window Closed / Lapsed |