Patent US2918089A successfully refreshed from Google Patents.
US2918089A
Expired / Lapsed
US
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Diaphragm assembly
Assignee: Boeing North American Inc
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Filing: 1955-11-03
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Granted: 1959-12-22
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Expires: 1975-11-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Rolland Mcfarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:39
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/12; F16K7/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1146622A
Cited
GB434665A
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US2203859A
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US2270259A
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US2633155A
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US2615471A
Cited
US2710629A
Cited
GB720836A
Cited
US2716017A
Cited
US2787681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |