US2635932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring assembly for the pistons of internal-combustion engines
Assignee: Individual
•
Filing: 1949-03-28
•
Granted: 1953-04-21
•
Expires: 1969-03-28
Abstract
No abstract record available.
Inventors
- 👤 Heusser Wilfrid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:59
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/28; F16J9/06; F16J9/061; F16J9/063; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/936; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/49256
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US131645A
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US214083A
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US1495773A
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US1092834A
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US1259292A
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US1467256A
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US1743023A
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US2092086A
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US2396018A
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US2419192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |