Patent US3411490A successfully refreshed from Google Patents.
US3411490A
Expired / Lapsed
US
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Intake port structure for internal combustion engine
Assignee: Volvo White Truck Corp
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Filing: 1966-12-09
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Granted: 1968-11-19
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Expires: 1986-12-09
Abstract
No abstract record available.
Inventors
- 👤 Lucas L Akana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:33
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02M; F02M1/00; F02B; F02B75/00; F02B75/16; F02B75/18; F02B2075/1804; F02B2075/1832; F02B2275/00; F02B2275/14; F02B3/00; F02B3/06; F02B75/22; F02F2001/244; F02F2001/247; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4392
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3125075A
Cited
US2230740A
Cited
US3060914A
Cited
GB839945A
Cited
FR1192664A
Cited
GB938887A
Cited
FR1368394A
Cited
US3331359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |