US3485180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-acting pump for gas or liquid
Assignee: SIGFRID M OLOFSSON
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Filing: 1968-05-28
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Granted: 1969-12-23
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Expires: 1988-05-28
Abstract
No abstract record available.
Inventors
- 👤 Chester H Wickenberg
- 👤 Sigfrid M Olofsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:03
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; F04B53/1047; F04B53/106; F04B53/1065; F04B19/00; F04B19/02; F04B19/022; F04B9/00; F04B9/14
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) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |