Patent US3702704A successfully refreshed from Google Patents.
US3702704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noncontacting seal for centrifuge inlet
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1970-12-24
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Granted: 1972-11-14
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Expires: 1990-12-24
Abstract
Abstract A NON-CONTACTING SEAL BUSHING HAS A BORE MACHINED IN THE FORM OF A HELICAL LABYRINTH WHICH, WHEN MOUNTED ON A ROTATING CENTRIFUGE DISTRIBUTION CONE, PREVENTS BY-PASSING OF FEED SLURRY BETWEEN THE FEED PIPE AND THE DISTRIBUTION CONE.
Inventors
- 👤 Heinz P Bloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:29
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/406
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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |