Patent US2812664A successfully refreshed from Google Patents.
US2812664A
Expired / Lapsed
US
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Wabbler type internal combustion engine
Assignee: SAMUEL B ECKERT
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Filing: 1953-01-22
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Granted: 1957-11-12
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Expires: 1973-01-22
Abstract
No abstract record available.
Inventors
- 👤 Howe H Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:37
CPC Classifications
F; F16; F16H; F16H23/00; F16H23/04; F16H23/06; F02; F02B; F02B75/00; F02B75/26; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18336
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |