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Patent US2330781A successfully refreshed from Google Patents.
US2330781A
Expired / Lapsed
US
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Conveying fluids containing solids
Assignee: Standard Oil Development Co
•
Filing: 1941-05-28
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Granted: 1943-09-28
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Expires: 1961-05-28
Abstract
No abstract record available.
Inventors
- 👤 George J Langmyhr
- 👤 Jefferson M Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:27
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/16; F04B53/162; F04B53/164; F04B13/00; F04B13/02; F04B15/00; F04B15/02; F04B5/00; F04B53/10; F04B53/1002; F04B53/101; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-09-27 | 1947-03-29 | 1947-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-09-27 | 1951-03-29 | 1951-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-09-27 | 1955-03-29 | 1955-09-28 | $7700.00 | Window Closed / Lapsed |