US2528628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilated underwater internalcombustion engine
Assignee: WAYNE B WEED
•
Filing: 1945-05-14
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Granted: 1950-11-07
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Expires: 1965-05-14
Abstract
No abstract record available.
Inventors
- 👤 Robert B Whitney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:36
CPC Classifications
B; B63; B63H; B63H21/00; B63H21/38; F; F01; F01P; F01P3/00; F01P3/20; F01P3/202; F02; F02B; F02B63/00; F02B63/04; F02B61/00; F02B61/04; F02B61/045; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20207; Y10T74/20213; Y10T74/20232; Y10T74/20396; Y10T74/20402; Y10T74/2042; Y10T74/20438
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US747801A
Cited
GB190608641A
Cited
US1571421A
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GB310160A
Cited
US1804442A
Cited
US1932521A
Cited
US2155112A
Cited
US2216496A
Cited
US2271174A
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US2241379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |