Patent US2393691A successfully refreshed from Google Patents.
US2393691A
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Pumping unit
Assignee: Worthington Pump and Machinery Corp
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Filing: 1943-11-03
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Granted: 1946-01-29
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Expires: 1963-11-03
Abstract
No abstract record available.
Inventors
- 👤 Igor J Karassik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:16
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/14; F04D29/146; F01; F01D; F01D11/00; F01D11/02; F01D11/04; F01D15/00; F01D15/08; F04D13/00; F04D13/02; F04D13/04; F16; F16J; F16J15/00; F16J15/54
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) | 1949-01-28 | 1949-07-30 | 1950-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-01-28 | 1953-07-30 | 1954-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-01-28 | 1957-07-30 | 1958-01-29 | $7700.00 | Window Closed / Lapsed |