Patent US2224338A successfully refreshed from Google Patents.
US2224338A
Expired / Lapsed
US
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Sheet metal piston ring
Assignee: POWER RES CORP
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Filing: 1940-03-28
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Granted: 1940-12-10
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Expires: 1960-03-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Bowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:23
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/06; B23P15/065; F; F16; F16J; F16J9/00; F16J9/12; F16J9/20; F16J9/203; F16J9/206; Y; Y10; Y10S; Y10S277/00; Y10S277/924; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T29/49282; 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) | 1943-12-10 | 1944-06-10 | 1944-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-10 | 1948-06-10 | 1948-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-10 | 1952-06-10 | 1952-12-10 | $7700.00 | Window Closed / Lapsed |