Patent US2622391A successfully refreshed from Google Patents.
US2622391A
Expired / Lapsed
US
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Intake and exhaust pressure regulator for supercharged internal-combustion engines
Assignee: Individual
•
Filing: 1946-04-22
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Granted: 1952-12-23
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Expires: 1966-04-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles A Lindeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:06
CPC Classifications
F; F02; F02D; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0269; F02D2700/0274; F02D2700/0279
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE305111C
Cited
US2164167A
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US2283006A
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GB537483A
Cited
US2373139A
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US2347586A
Cited
US2376199A
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US2423417A
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US2467513A
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US2376143A
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US2559623A
Cited
US2495564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |