Patent US3527552A successfully refreshed from Google Patents.
US3527552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable rotary pump with pressure relief
Assignee: Entwicklungsring Sued GmbH
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Filing: 1968-10-22
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Granted: 1970-09-08
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Expires: 1988-10-22
Abstract
No abstract record available.
Inventors
- 👤 Hans Lincks
- 👤 Hans Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:31
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/18; F04C14/22; F04C14/223; F01; F01C; F01C21/00; F01C21/10; F01C21/104; F01C21/106; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/3446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2170786A
Cited
US2238786A
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US2313075A
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US2631544A
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US2646003A
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US3266429A
Cited
US3407742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |