US2698576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic control of interstage pressures in pumps
Assignee: EIDP Inc
•
Filing: 1951-10-06
•
Granted: 1955-01-04
•
Expires: 1971-10-06
Abstract
No abstract record available.
Inventors
- 👤 Strub Rene Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:33
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/08; F16; F16H; F16H39/00; F16H39/04; F16H39/06; F16H39/08; F16H39/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US208704A
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GB189715098A
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US943848A
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FR672406A
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US2102606A
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US2602461A
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US2603131A
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US2585349A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |