US2345370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Replaceable liner construction for mud pumps
Assignee: Emsco Derrick and Equipment Co
•
Filing: 1942-05-11
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Granted: 1944-03-28
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Expires: 1962-05-11
Abstract
No abstract record available.
Inventors
- 👤 Jesse P Whann
- 👤 Zumeta Julio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:33
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/16; F04B53/162; F04B53/166; F04B53/168; F16; F16J; F16J10/00; F16J10/02; F16J10/04
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) | 1947-03-28 | 1947-09-27 | 1948-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-03-28 | 1951-09-27 | 1952-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-03-28 | 1955-09-27 | 1956-03-28 | $7700.00 | Window Closed / Lapsed |