US3522950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston and ptfe ring assembly for internal combustion engines
Assignee: Flowserve Corp
•
Filing: 1967-11-13
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Granted: 1970-08-04
•
Expires: 1987-11-13
Abstract
No abstract record available.
Inventors
- 👤 Robert C Schneck Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:19
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/28; F16J9/12; F16J9/20; F02; F02B; F02B2275/00; F02B2275/18; F05; F05C; F05C2225/00; F05C2225/04; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944; Y10S277/945; Y10S277/946
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1348641A
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US1527535A
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US2221988A
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US2328390A
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US2376147A
Cited
FR998795A
Cited
US2973978A
Cited
US2908537A
Cited
GB1056145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |