Patent US3391951A successfully refreshed from Google Patents.
US3391951A
Expired / Lapsed
US
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Diaphragm sealed coupling
Assignee: Weatherhead Co
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Filing: 1966-12-07
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Granted: 1968-07-09
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Expires: 1986-12-07
Abstract
No abstract record available.
Inventors
- 👤 Paul J Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:32
CPC Classifications
F; F16; F16L; F16L29/00; F16L29/005; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1759
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1959822A
Cited
US2516159A
Cited
US2813568A
Cited
FR1207428A
Cited
US3202442A
Cited
US3201148A
Cited
US3285627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |