US1913136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick-seating piston ring and method of making the same
Assignee: Wilkening Manufacturing Co
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Filing: 1928-08-06
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Granted: 1933-06-06
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Expires: 1948-08-06
Abstract
No abstract record available.
Inventors
- 👤 Wuerfel William
- 👤 Haviland H Platt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:28
CPC Classifications
B; B23; B23P; B23P9/00; Y; Y10; Y10S; Y10S277/00; Y10S277/924; Y10T; Y10T29/00; Y10T29/47; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T29/49279; Y10T82/00; Y10T82/10
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) | 1936-06-05 | 1936-12-05 | 1937-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-06-05 | 1940-12-05 | 1941-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-06-05 | 1944-12-05 | 1945-06-06 | $7700.00 | Window Closed / Lapsed |