Patent US2705922A successfully refreshed from Google Patents.
US2705922A
Expired / Lapsed
US
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Fluid pump or motor of the rotary screw type
Assignee: Dresser Industries Inc
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Filing: 1953-04-06
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Granted: 1955-04-12
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Expires: 1973-04-06
Abstract
No abstract record available.
Inventors
- 👤 Rathman Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:56
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/12; F04C2/14; F04C2/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2511878A
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US2111568A
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US2174522A
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US2266820A
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US2287716A
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US2481527A
Cited
US2474653A
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US2620968A
Cited
US2578196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-11 | 1958-10-11 | 1959-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-11 | 1962-10-11 | 1963-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-11 | 1966-10-11 | 1967-04-12 | $7700.00 | Window Closed / Lapsed |