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Patent US3412752A successfully refreshed from Google Patents.
US3412752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air admission regulator valve for internal combustion engine
Assignee: Individual
•
Filing: 1967-04-27
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Granted: 1968-11-26
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Expires: 1987-04-27
Abstract
No abstract record available.
Inventors
- 👤 Harry C Gordon
- 👤 Frederick E Kort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:49
CPC Classifications
F; F02; F02M; F02M23/00; F02M23/04; F02M23/08; F02M23/09; F02B; F02B1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4373; F02M2700/4378; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7748; Y10T137/7749; Y10T137/7752; Y10T137/7781; Y10T137/7784; Y10T137/7792
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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |