Patent US3425399A successfully refreshed from Google Patents.
US3425399A
Expired / Lapsed
US
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Stratified charge gas engine
Assignee: American Gas Association Inc
•
Filing: 1966-05-23
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Granted: 1969-02-04
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Expires: 1986-05-23
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Ward
- 👤 Julius E Witzky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:35
CPC Classifications
F; F02; F02B; F02B17/00; F02B17/005; F02B43/00; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2805654A
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US2762351A
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US2667155A
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US2763248A
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US2799255A
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US2792817A
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US2914041A
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US3062198A
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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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |