Patent US2958293A successfully refreshed from Google Patents.
US2958293A
Expired / Lapsed
US
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Solids pump
Assignee: Western Machinery Co
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Filing: 1955-02-25
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Granted: 1960-11-01
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Expires: 1975-02-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Reuel Ford Pray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:57
CPC Classifications
F; F04; F04D; F04D7/00; F04D7/02; F04D7/04; F04D29/00; F04D29/18; F04D29/22; F04D29/2238; F04D29/2244; F04D29/60; F04D29/62; F04D29/628; F05; F05D; F05D2260/00; F05D2260/60; F05D2260/604
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1074606A
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US1238260A
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DE488639C
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GB421528A
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GB473253A
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US2635548A
Cited
US2655868A
Cited
US2680409A
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DE885200C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |