US2530673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping viscous fluids
Assignee: Union Oil Company of California
•
Filing: 1945-01-24
•
Granted: 1950-11-21
•
Expires: 1965-01-24
Abstract
No abstract record available.
Inventors
- 👤 Richard H Zinszer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:10
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; F04B53/00; F04B53/14; F04B53/144
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US371197A
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US1376877A
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US1013579A
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US1206706A
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US1246543A
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US1412146A
Cited
US1530624A
Cited
US1652368A
Cited
US1648541A
Cited
US1901031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |