Patent US3059585A successfully refreshed from Google Patents.
US3059585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Built-up rotors for rotary engines
Assignee: Wankel GmbH
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Filing: 1960-04-04
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Granted: 1962-10-23
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Expires: 1980-04-04
Abstract
No abstract record available.
Inventors
- 👤 Froede Walter
- 👤 Paschke Hanns-Dieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:22
CPC Classifications
F; F02; F02B; F02B55/00; F02B55/02; F02B55/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/49321; Y10T29/49826; Y10T29/49893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE189727C
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US926000A
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US1617863A
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US1686569A
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US2194349A
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GB557902A
Cited
GB583035A
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US2803500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |