Patent US4162220A successfully refreshed from Google Patents.
US4162220A
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Blood filter
Assignee: Purolator Technologies Inc
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Filing: 1978-04-03
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Granted: 1979-07-24
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Expires: 1998-04-03
Abstract
Abstract In a blood filter of the type having a blood inlet spike which is to be inserted in a blood bag the improvement comprising the outer surface of the blood inlet spike having a roughness of from about 50 to 200 microinches.
Inventors
- 👤 Francis M. Servas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/162
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
110 words
In a blood filter of the type having an inlet spike for insertion into an outlet of a blood bag, said spike being made from a plastic material selected from the group consisting of polyolefins, polycarbonates, polystyrene, polyacrylics, polyesters, polyacylonitrile, nylon, polyphenylene oxides, polysulfones, polyvinylchloride and their copolymers, the improvement comprising the outer surface of said spike, that is the surface which is to contact the bag opening during insertion of the filter, having a uniformly roughened finish of from 50 to 200 microinches, whereby the spike may be easily inserted and removed from the outlet of each of a series of blood bags without the use of a lubricant.
Claim 2
Dependent Claim
110 words
In a blood filter of the type having an inlet spike for insertion into an outlet of a blood bag, said spike being made from a plastic material selected from the group consisting of polyolefins, polycarbonates, polystyrene, polyacrylics, polyesters, polyacylonitrile, nylon, polyphenylene oxides, polysulfones, polyvinylchloride and their copolymers, the improvement comprising the outer surface of said spike, that is the surface which is to contact the bag opening during insertion of the filter, having a uniformly roughened finish of from 50 to 200 microinches, whereby the spike may be easily inserted and removed from the outlet of each of a series of blood bags without the use of a lubricant.
Claim 3
Dependent Claim
20 words
A blood filter according to claim 1 wherein the finish of the inlet spike is from 90 to 130 microinches.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-23 | 1983-01-22 | 1983-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-23 | 1987-01-22 | 1987-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-23 | 1991-01-22 | 1991-07-24 | $7700.00 | Window Closed / Lapsed |