US2331513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slush pump
Assignee: Emsco Derrick and Equipment Co
•
Filing: 1940-10-30
•
Granted: 1943-10-12
•
Expires: 1960-10-30
Abstract
No abstract record available.
Inventors
- 👤 Leslie W Stahl
- 👤 Ralph L Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:26
CPC Classifications
F; F04; F04B; F04B53/00; F04B1/00; F04B1/02; F04B15/00; F04B15/02; F04B5/00; F04B5/02; F04B53/14; F04B53/144; F04B53/16; F04B53/162; F04B53/164; 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) | 1946-10-11 | 1947-04-12 | 1947-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-11 | 1951-04-12 | 1951-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-11 | 1955-04-12 | 1955-10-12 | $7700.00 | Window Closed / Lapsed |