US3456954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compression piston ring assembly
Assignee: TRW Automotive Products Inc
•
Filing: 1968-02-19
•
Granted: 1969-07-22
•
Expires: 1988-02-19
Abstract
No abstract record available.
Inventors
- 👤 Herbert F Prasse
- 👤 Donald J Mayhew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:39
CPC Classifications
F; F16; F16J; F16J9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1340650A
Cited
US2213452A
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US2459395A
Cited
DE918909C
Cited
DE1008072B
Cited
DE1099812B
Cited
US2970023A
Cited
US3031240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |