US2956556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inlet passages for internal combustion engines
Assignee: Individual
•
Filing: 1955-04-18
•
Granted: 1960-10-18
•
Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 Weslake Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:32
CPC Classifications
F; F02; F02M; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4392
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2804862A
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US2740392A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |