Patent US2920655A successfully refreshed from Google Patents.
US2920655A
Expired / Lapsed
US
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High temperature and high pressure diaphragm
Assignee: Sunoco Inc
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Filing: 1956-07-31
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Granted: 1960-01-12
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Expires: 1976-07-31
Abstract
No abstract record available.
Inventors
- 👤 James L Dwyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:27
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/12; F16J; F16J3/00; F16J3/02; G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0633
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |