US3495578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive crankcase ventilating devices
Assignee: Nycal Co Inc
•
Filing: 1968-05-02
•
Granted: 1970-02-17
•
Expires: 1988-05-02
Abstract
No abstract record available.
Inventors
- 👤 Vincent Guarnaschelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:35
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2154593A
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FR554416A
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US1519393A
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US1637941A
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GB384656A
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CH171473A
Cited
US2128154A
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US2166720A
Cited
US2255351A
Cited
US2516547A
Cited
FR999735A
Cited
US2681051A
Cited
US3176670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |