US3528398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating system for rotary piston internal combustion engines
Assignee: Sachsenring Automobilwerke VEB
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Filing: 1967-06-02
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Granted: 1970-09-15
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Expires: 1987-06-02
Abstract
No abstract record available.
Inventors
- 👤 Sieghard Weissflog
- 👤 Karl-Heinz Muller
- 👤 Winfried Tausch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:44
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/04; F01M; F01M1/00; F01M1/06; F02; F02B; F02B53/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |