Patent DE3641908A1 successfully refreshed from Google Patents.
Patent US3532444A successfully refreshed from Google Patents.
US3532444A
Expired / Lapsed
US
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Gas pumping apparatus
Assignee: Sulzer AG
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Filing: 1968-08-14
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Granted: 1970-10-06
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Expires: 1988-08-14
Abstract
No abstract record available.
Inventors
- 👤 Rene Strub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:10
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/102; F04D29/104; F04D25/00; F04D25/02; F04D25/06; F05; F05D; F05D2260/00; F05D2260/60; F05D2260/602; F05D2260/6022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2710205A
Cited
US2820652A
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US2913989A
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US2910328A
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US2911919A
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US3356290A
Cited
US3305518A
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US3420434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |