Patent US3238891A successfully refreshed from Google Patents.
US3238891A
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Pump apparatus
Assignee: Huels AG
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Filing: 1963-10-07
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Granted: 1966-03-08
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Expires: 1983-10-07
Abstract
No abstract record available.
Inventors
- 👤 Thier Bernd
- 👤 Ott Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:51
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/06; B; B01; B01D; B01D19/00; B01D19/0068; F04B15/00; F04B15/06; F04B15/08; F04B39/00; F04B39/08; F04B49/00; F04B49/22; F04B49/24; F04B49/243
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |