Patent US2520288A successfully refreshed from Google Patents.
US2520288A
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Assignee: Crane Process Flow Technologies Ltd
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Filing: 1944-07-24
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Granted: 1950-08-29
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Expires: 1964-07-24
Abstract
No abstract record available.
Inventors
- 👤 Shand Stanley Grapes
- 👤 Price Richard Hector
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:27
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/20; F16K5/205; F16K5/208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1330429A
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US1616386A
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US1807139A
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US1879481A
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CH167585A
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US2173949A
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NL44522C
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US2201895A
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US2191232A
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US2297161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |