Patent US3488763A successfully refreshed from Google Patents.
US3488763A
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US
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Rolling seal pump
Assignee: ALDEN A LOFQUIST JR
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Filing: 1968-02-16
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Granted: 1970-01-06
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Expires: 1988-02-16
Abstract
No abstract record available.
Inventors
- 👤 Alden A Lofquist Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:56
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/02; F04B15/00; F04B15/04; F04B53/00; F04B53/16; F04B53/162; F04B53/164
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2342906A
Cited
US2545506A
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US3241379A
Cited
GB961750A
Cited
US3327633A
Cited
US3279381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |