Patent US3042009A successfully refreshed from Google Patents.
US3042009A
Expired / Lapsed
US
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Cooling arrangement for rotary mechanisms
Assignee: Wankel GmbH
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Filing: 1959-10-01
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Granted: 1962-07-03
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Expires: 1979-10-01
Abstract
No abstract record available.
Inventors
- 👤 Froede Walter Gray
- 👤 Hoppner Ernst
- 👤 Paschke Hanns-Dieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:14
CPC Classifications
F; F02; F02B; F02B55/00; F02B55/02; F02B55/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE103413C
Cited
US2871831A
Cited
US1228806A
Cited
GB191509359A
Cited
US1636486A
Cited
GB583035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |