US2119035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring process
Assignee: SPX Technologies Inc
•
Filing: 1937-03-29
•
Granted: 1938-05-31
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Expires: 1957-03-29
Abstract
No abstract record available.
Inventors
- 👤 Ballard John Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:56
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/16; B23; B23P; B23P15/00; B23P15/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T29/49281; Y10T29/49284
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) | 1941-05-30 | 1941-11-29 | 1942-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-05-30 | 1945-11-29 | 1946-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-05-30 | 1949-11-29 | 1950-05-31 | $7700.00 | Window Closed / Lapsed |