Patent JPS57166242A successfully refreshed from Google Patents.
Patent US5290221A successfully refreshed from Google Patents.
US5290221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Systems for eradicating contaminants using photoactive materials in fluids like blood
Assignee: Fenwal Inc
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Filing: 1992-12-17
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Granted: 1994-03-01
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Expires: 2012-12-17
Abstract
Abstract Systems for treating a fluid carrying a contaminant to which a photoactive material has been bound include a treatment device that defines a relatively narrow, arcuately shaped flow path. These systems envelop the path with a radiation chamber that directs radiation from one or more sources into the fluid.
Inventors
- 👤 Ludwig Wolf, Jr.
- 👤 John T. Foley
- 👤 William R. Bratten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:18
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/02; A61L2/08; A61M; A61M1/00; A61M1/36; A61M1/3681; A61M1/3683; B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; C; C12; C12N; C12N7/00; C12N7/04; A61L2103/00; A61L2103/05
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
127 words
A device for treating a fluid carrying a contaminant to which a photoactive material has been bound, the material being activated by exposure to radiation within a prescribed wavelength range to eradicate the contaminant, the device comprising a treatment chamber shaped as an arcuate gap that extends between an outer cylindrical wall and an inner cylindrical wall spaced from the outer wall, the outer wall being essentially transparent to radiation within the prescribed wavelength to pass the radiation into the gap, the outer wall comprising a exterior wall of a generally flexible container and the inner wall comprising the opposite exterior wall of the flexible container and a generally cylindrical preformed interior platen about which the flexible container has been attached with the exterior container wall exposed.
Claim 2
Independent Claim
127 words
A device for treating a fluid carrying a contaminant to which a photoactive material has been bound, the material being activated by exposure to radiation within a prescribed wavelength range to eradicate the contaminant, the device comprising a treatment chamber shaped as an arcuate gap that extends between an outer cylindrical wall and an inner cylindrical wall spaced from the outer wall, the outer wall being essentially transparent to radiation within the prescribed wavelength to pass the radiation into the gap, the outer wall comprising a exterior wall of a generally flexible container and the inner wall comprising the opposite exterior wall of the flexible container and a generally cylindrical preformed interior platen about which the flexible container has been attached with the exterior container wall exposed.
Claim 3
Dependent Claim
22 words
A device according to claim 1 wherein the annular gap includes an inlet for receiving fluid and an outlet for discharging fluid.
Claim 4
Dependent Claim
41 words
A device according to claim 1 and further including an exterior platen that nests concentrically about the interior platen to capture the flexible container therebetween, the exterior platen being made of a material that is essentially transparent to the treatment radiation.
Claim 5
Independent Claim
192 words
A system for treating a fluid carrying a contaminant to which a photoactive material has been bound, the material being activated by exposure to radiation within a prescribed wavelength range to eradicate the contaminant, the system comprising a radiation chamber including a generally elliptical reflective surface having at least one focal point, means for establishing a source of radiation positioned within the reflective surface and having a selected wavelength within the prescribed range to activate the photoactive material bound to the contaminant, and a treatment device located within the reflective surface at a focal point of the ellipse, the treatment device including a treatment chamber shaped as an arcuate gap that extends between an outer cylindrical wall and an inner cylindrical wall spaced from the outer wall, the outer wall being essentially transparent to radiation within the prescribed wavelength to pass the radiation into the gap, the outer wall comprising a exterior wall of a generally flexible container and the inner wall comprising the opposite exterior wall of the flexible container and a generally cylindrical preformed interior platen about which the flexible container has been attached with the exterior container wall exposed.
Claim 6
Independent Claim
192 words
A system for treating a fluid carrying a contaminant to which a photoactive material has been bound, the material being activated by exposure to radiation within a prescribed wavelength range to eradicate the contaminant, the system comprising a radiation chamber including a generally elliptical reflective surface having at least one focal point, means for establishing a source of radiation positioned within the reflective surface and having a selected wavelength within the prescribed range to activate the photoactive material bound to the contaminant, and a treatment device located within the reflective surface at a focal point of the ellipse, the treatment device including a treatment chamber shaped as an arcuate gap that extends between an outer cylindrical wall and an inner cylindrical wall spaced from the outer wall, the outer wall being essentially transparent to radiation within the prescribed wavelength to pass the radiation into the gap, the outer wall comprising a exterior wall of a generally flexible container and the inner wall comprising the opposite exterior wall of the flexible container and a generally cylindrical preformed interior platen about which the flexible container has been attached with the exterior container wall exposed.
Claim 7
Dependent Claim
21 words
A system according to claim 4 wherein the means for establishing a source of radiation includes a single source of radiation.
Claim 8
Dependent Claim
43 words
A system according to claim 5 wherein the elliptical reflective surface includes two diametrically spaced focal points, and wherein the single source of radiation is positioned at one of the focal points and the treatment chamber is position at the other focal point.
Claim 9
Dependent Claim
22 words
A system according to claim 4 wherein the means for establishing a source of radiation includes at least two sources of radiation.
Claim 10
Dependent Claim
12 words
A system according to claim 7 wherein each radiation source is discrete.
Claim 11
Dependent Claim
13 words
A system according to claim 8 wherein the radiation source includes a photodiode.
Claim 12
Dependent Claim
74 words
A system according to claim 4 wherein the elliptical reflective surface includes an open end extending along its minor axis and closed end spaced from the open end and including a focal point, wherein means for establishing a source of radiation is located at the open end of the ellipse and faces in the direction of the closed end, and wherein the treatment device is located in the closed end at the focal point.
Claim 13
Dependent Claim
22 words
A system according to claim 10 wherein the means for establishing a source of radiation includes at least two sources of radiation.
Claim 14
Dependent Claim
12 words
A system according to claim 11 wherein each radiation source is discrete.
Claim 15
Dependent Claim
13 words
A system according to claim 10 wherein the sources of radiation include photodiodes.
Claim 16
Independent Claim
179 words
A system for treating a fluid carrying a contaminant to which a photoactive material has been bound, the material being activated by exposure to radiation within a prescribed wavelength range to eradicate the contaminant, the system comprising a treatment device including a treatment chamber shaped as an arcuate gap that extends between an outer cylindrical wall and an inner cylindrical wall spaced from the outer wall, the inner wall being essentially transparent to radiation within the prescribed wavelength to pass the radiation into the gap, and a radiation chamber including means for establishing a source of radiation positioned adjacent the inner wall of the treatment chamber and having a selected wavelength within the prescribed range to activate the photoactive material bound to the contaminant, the inner and outer walls comprising the exterior walls of a generally flexible container, and the inner wall further comprises a generally cylindrical platen that surrounds the source of radiation and about which the flexible container has been attached, the platen being made of a material essentially transparent to the radiation emitted by the source.
Claim 17
Independent Claim
179 words
A system for treating a fluid carrying a contaminant to which a photoactive material has been bound, the material being activated by exposure to radiation within a prescribed wavelength range to eradicate the contaminant, the system comprising a treatment device including a treatment chamber shaped as an arcuate gap that extends between an outer cylindrical wall and an inner cylindrical wall spaced from the outer wall, the inner wall being essentially transparent to radiation within the prescribed wavelength to pass the radiation into the gap, and a radiation chamber including means for establishing a source of radiation positioned adjacent the inner wall of the treatment chamber and having a selected wavelength within the prescribed range to activate the photoactive material bound to the contaminant, the inner and outer walls comprising the exterior walls of a generally flexible container, and the inner wall further comprises a generally cylindrical platen that surrounds the source of radiation and about which the flexible container has been attached, the platen being made of a material essentially transparent to the radiation emitted by the source.
Claim 18
Dependent Claim
24 words
A system according to claim 14 wherein the radiation chamber further includes a reflective surface surrounding the outer exterior wall of the flexible container.
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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) | 1997-02-28 | 1997-08-30 | 1998-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-28 | 2001-08-30 | 2002-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-28 | 2005-08-30 | 2006-03-01 | $7700.00 | Window Closed / Lapsed |