Patent US2920486A successfully refreshed from Google Patents.
US2920486A
Expired / Lapsed
US
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Diaphragm assembly
Assignee: General Electric Co
•
Filing: 1954-09-29
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Granted: 1960-01-12
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Expires: 1974-09-29
Abstract
No abstract record available.
Inventors
- 👤 John L Slonneger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:51
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D23/125; G05D23/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US478688A
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US909818A
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US1781287A
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US1819947A
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US1910322A
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US2103214A
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US1976843A
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US2241571A
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US2203841A
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US2331464A
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US2506937A
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US2697448A
Cited
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 |