Patent US3741467A successfully refreshed from Google Patents.
US3741467A
Expired / Lapsed
US
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Centrifugal separator
Assignee: Alfa Laval AB
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Filing: 1970-07-22
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Granted: 1973-06-26
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Expires: 1990-07-22
Abstract
Abstract In a centrifugal separator having a source of supply of a liquid to be separated, a surface of the separator which contacts the liquid is coated with a poly-alkene which is at least partly fluorinated.
Inventors
- 👤 O Kjellgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:47
CPC Classifications
B; B04; B04B; B04B7/00; B04B7/08; B04B1/00; B04B1/04; B04B1/08; B04B7/12; B04B7/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
12 words
The combination according to claim 1, in which said coating is poly-(tetrafluoro-ethylene-perfluoro-propene).
Claim 2
Dependent Claim
12 words
The combination according to claim 1, in which said coating is poly-chlorotrifluoro-ethylene.
Claim 3
Dependent Claim
12 words
The combination according to claim 1, in which said coating is poly-vinylidenefluoride.
Claim 4
Dependent Claim
12 words
The combination according to claim 1, in which said coating is poly-vinylfluoride.
Claim 5
Dependent Claim
12 words
The combination according to claim 1, in which said coating is poly-tetrafluoro-ethylene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |