US4915683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiviral method, agents and apparatus
Assignee: Medical College of Wisconsin
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Filing: 1987-03-10
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Granted: 1990-04-10
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Expires: 2007-03-10
Abstract
Abstract A method of treating a body fluid which is to be infused so as to inactivate any enveloped viruses in said fluid comprises mixing the body fluid with an effective amount of a photosensitizing agent which will bind to the viruses and/or virus infected cells and photosensitize them, and then exposing the resulting mixture to visible light to excite and inactivate the viruses. An apparatus for use in the method includes at least one container which contains an effective amount of the photosensitizing agent and which has at least one wall which is permeable to visible light. A number of photosensitizing agents which can be used in the method also are disclosed.
Inventors
- 👤 Fritz Sieber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3681; A61M1/3683; A61M1/3686; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/495; A61K31/505; A61K31/513; A61K31/515; A61L; A61L2/00; A61L2/02; A61L2/08; C; C12; C12N; C12N7/00; A61L2103/00; A61L2103/05; A61L2103/09; A61L2103/15; A61L2103/20; A61M1/3621; A61M1/3623; C12N2710/00; C12N2710/00011; C12N2710/16011; C12N2710/16611; C12N2710/16661; C12N2710/16663
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
182 words
The method of treating a body fluid to inactivate viruses therein which comprises first bringing said body fluid into contact with an effective amount of a photosensitizing agent which selectively binds to enveloped viruses and enveloped virus infected cells and then exposing the combination of body fluid and agent to visible light to photosensitize and inactivate the enveloped viruses in said body fluid said photosensitizing agent having the following formula: ##STR4## in which n is 1-5, x is oxygen (0), sulfur (S), --CR 1 R 2 -- or selenium (Se); y is O or S, M is alkali metal or other basic group; R 1 and R 2 are the same or different alkyl groups of 1 to 8 carbon; and, R 3 , R 4 , R 5 and R 6 are selected from hydrogen, lower alkyl group of 1 to 5 carbons, lower alkoxy groups of 1 to 5 carbon atoms, phenyl lower alkyls; or R 3 and R 4 , or R 4 and R 5 , or R 5 and R 6 are part of an aromatic ring.
Claim 2
Independent Claim
182 words
The method of treating a body fluid to inactivate viruses therein which comprises first bringing said body fluid into contact with an effective amount of a photosensitizing agent which selectively binds to enveloped viruses and enveloped virus infected cells and then exposing the combination of body fluid and agent to visible light to photosensitize and inactivate the enveloped viruses in said body fluid said photosensitizing agent having the following formula: ##STR4## in which n is 1-5, x is oxygen (0), sulfur (S), --CR 1 R 2 -- or selenium (Se); y is O or S, M is alkali metal or other basic group; R 1 and R 2 are the same or different alkyl groups of 1 to 8 carbon; and, R 3 , R 4 , R 5 and R 6 are selected from hydrogen, lower alkyl group of 1 to 5 carbons, lower alkoxy groups of 1 to 5 carbon atoms, phenyl lower alkyls; or R 3 and R 4 , or R 4 and R 5 , or R 5 and R 6 are part of an aromatic ring.
Claim 3
Dependent Claim
14 words
The method of the claim 1 in which the photosensitizing agent is merocyanine 540.
Claim 4
Dependent Claim
104 words
In a blood collection system which comprises a sterile, closed blood bag which is transparent to visible light and which has integral blood collection means, the improvement which comprises the interior of said sterile, closed bag prior to the collection of blood containing a safe and effective amount of a merocyanine dye which selectively will bind to any enveloped virus in the blood to be collected so that when the blood is collected and the bag containing the blood and dye is exposed to visible light of sufficient strength for a sufficient length of time any enveloped virus present will be photosensitized and inactivated.
Claim 5
Dependent Claim
104 words
In a blood collection system which comprises a sterile, closed blood bag which is transparent to visible light and which has integral blood collection means, the improvement which comprises the interior of said sterile, closed bag prior to the collection of blood containing a safe and effective amount of a merocyanine dye which selectively will bind to any enveloped virus in the blood to be collected so that when the blood is collected and the bag containing the blood and dye is exposed to visible light of sufficient strength for a sufficient length of time any enveloped virus present will be photosensitized and inactivated.
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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) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |