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Patent US2280552A successfully refreshed from Google Patents.
US2280552A
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Method and apparatus for manufacturing piston rings
Assignee: Budd Induction Heating Inc
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Filing: 1939-03-23
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Granted: 1942-04-21
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Expires: 1959-03-23
Abstract
No abstract record available.
Inventors
- 👤 Howard E Somes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:08
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/40; C21D1/00; C21D1/06; C21D1/09; C21D1/10; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274
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) | 1945-04-20 | 1945-10-20 | 1946-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-20 | 1949-10-20 | 1950-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-20 | 1953-10-20 | 1954-04-21 | $7700.00 | Window Closed / Lapsed |