Patent US2604050A successfully refreshed from Google Patents.
US2604050A
Expired / Lapsed
US
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Centrifugal pump impeller seal ring
Assignee: Standard Oil Development Co
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Filing: 1948-04-27
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Granted: 1952-07-22
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Expires: 1968-04-27
Abstract
No abstract record available.
Inventors
- 👤 Robert A Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:32
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/16; F04D29/165; F04D29/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1315822A
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US640345A
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US996446A
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US1168002A
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US1882679A
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US1869955A
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US2021346A
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US2182892A
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US2301654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |