Patent EP0651424A2 successfully refreshed from Google Patents.
US3567231A
Expired / Lapsed
US
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Rotary seal assembly
Assignee: Kearfott Guidance and Navigation Corp
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Filing: 1968-12-04
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Granted: 1971-03-02
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Expires: 1988-12-04
Abstract
Abstract A SEALING ASSEMBLY FOR A ROTATING MEMBER EXTENDING IN TWO MEDIUMS OF DIFFERING PRESSURES, INCLUDING ONE OR MORE BUSHINGS EXTENDING OVER THE ROTATING MEMBER WITH A NONWETTING LIQUID DISPOSED IN A SPACE BETWEEN THE BUSHINGS AND THE ROTATING MEMBER TO PROVIDE A SEAL BETWEEN THE MEDIUMS.
Inventors
- 👤 William C Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:43
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |