US1594903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making piston rings and apparatus therefor
Assignee: Individual
•
Filing: 1925-04-29
•
Granted: 1926-08-03
•
Expires: 1945-04-29
Abstract
No abstract record available.
Inventors
- 👤 Walter W Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:23
CPC Classifications
B; B23; B23B; B23B5/00; B23B5/26; B23P; B23P15/00; B23P15/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T29/49284; Y10T29/51; Y10T29/5104; Y10T29/5105; Y10T407/00; Y10T407/19; Y10T407/1946; Y10T408/00; Y10T408/03; Y10T408/36; Y10T408/375; Y10T408/55; Y10T408/561; Y10T408/5623; Y10T408/56238; Y10T409/00; Y10T409/30; Y10T409/303752; Y10T409/303808; Y10T82/00; Y10T82/25; Y10T82/2527
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) | 1929-08-02 | 1930-02-01 | 1930-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-08-02 | 1934-02-01 | 1934-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-08-02 | 1938-02-01 | 1938-08-03 | $7700.00 | Window Closed / Lapsed |