US1433937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring and the like and method of manufacturing the same
Assignee: Individual
•
Filing: 1919-12-04
•
Granted: 1922-10-31
•
Expires: 1939-12-04
Abstract
No abstract record available.
Inventors
- 👤 Clews Bert
- 👤 Petersen Holger Magnus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:03
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T29/49284; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12208; Y10T428/12333; Y10T428/12389
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1925-10-30 | 1926-05-01 | 1926-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-10-30 | 1930-05-01 | 1930-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-10-30 | 1934-05-01 | 1934-10-31 | $7700.00 | Window Closed / Lapsed |