Patent US3496918A successfully refreshed from Google Patents.
US3496918A
Expired / Lapsed
US
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Variable valve timing control for internal combustion engines
Assignee: MADISON H FINLAY
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Filing: 1968-04-23
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Granted: 1970-02-24
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Expires: 1988-04-23
Abstract
No abstract record available.
Inventors
- 👤 Madison H Finlay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:39
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/34; F01L1/344; F01L1/348; F16; F16H; F16H7/00; F16H7/08; F16H2007/0861; F16H2007/0863; F16H2007/0874; F16H35/00; F16H35/008; Y; Y10; Y10S; Y10S474/00; Y10S474/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |