Patent US4601286A successfully refreshed from Google Patents.
US4601286A
Expired / Lapsed
US
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Article for the protection of living tissues
Assignee: BIO-MED PLASTICS Inc
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Filing: 1984-04-20
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Granted: 1986-07-22
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Expires: 2004-04-20
Abstract
Abstract An article for the protection of living tissue from damage due to exposure to lasers or microorganisms comprising A. A hydrogel comprising 1. at least one water-insoluble hydrophilic polymer and 2. water and B. If desired, at least one additive selected from the group consisting of medications, colorants and moisturizers.
Inventors
- 👤 Jack W. Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:20
CPC Classifications
A; A61; A61B; A61B90/00; A61B90/04; A61B46/00; A61B2090/049
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
72 words
A surgical drape for the protection of healthy tissue from damage due to undesired exposure to lasers during surgery comprising a sheet having a hole therethrough, said hole having about the same dimensions as the site of tissue exposure to permit unimpeded passage of the beam therethrough and access to only the site to be lased said drape comprising a hydrogel comprising A. at least one hydrophilic water-insoluble polymer and B. water.
Claim 2
Dependent Claim
72 words
A surgical drape for the protection of healthy tissue from damage due to undesired exposure to lasers during surgery comprising a sheet having a hole therethrough, said hole having about the same dimensions as the site of tissue exposure to permit unimpeded passage of the beam therethrough and access to only the site to be lased said drape comprising a hydrogel comprising A. at least one hydrophilic water-insoluble polymer and B. water.
Claim 3
Dependent Claim
24 words
The drape according to claim 1 further comprising at least one additive selected from the group consisting of pharmaceutically acceptable salts, colorants and medications.
Claim 4
Dependent Claim
15 words
The drape according to claim 1 wherein the hydrophilic water-insoluble polymer comprises an acrylonitrile-acrylamide copolymer.
Claim 5
Dependent Claim
30 words
The drape according to claim 3 wherein said drape comprises two layers of hydrogel having a layer of metallic sheet interspersed therebetween and in contact with the inner surfaces thereof.
Claim 6
Dependent Claim
16 words
The drape according to claim 1 wherein the hydrophilic water-insoluble polymer comprises a crosslinked poly(ethylene oxide).
Claim 7
Dependent Claim
30 words
The drape according to claim 5 wherein said film comprises two layers of hydrogel having a layer of metallic sheet interspersed therebetween and in contact with the inner surfaces thereof.
Claim 8
Independent Claim
130 words
A method for protecting healthy tissue from damage due to undesired exposure to lasers during surgery comprising the steps of (1) applying thereto a surgical drape comprising a sheet having a hole therethrough, said hole having about the same dimensions at the site of tissue exposure to permit the unimpeded passage of the laser beam therethrough and access to only the site to be lased said sheet comprising a hydrogel comprising A. at least one hydrophilic water-insoluble polymer, B. water, and C. if desired, at least one additive selected from the group consisting of medications, colorants and moistureizers; and (2) as necessary, adding to said drape water or an aqueous solution of additive, if any, to replace water lost during the time the drape is in contact with the tissue.
Claim 9
Independent Claim
130 words
A method for protecting healthy tissue from damage due to undesired exposure to lasers during surgery comprising the steps of (1) applying thereto a surgical drape comprising a sheet having a hole therethrough, said hole having about the same dimensions at the site of tissue exposure to permit the unimpeded passage of the laser beam therethrough and access to only the site to be lased said sheet comprising a hydrogel comprising A. at least one hydrophilic water-insoluble polymer, B. water, and C. if desired, at least one additive selected from the group consisting of medications, colorants and moistureizers; and (2) as necessary, adding to said drape water or an aqueous solution of additive, if any, to replace water lost during the time the drape is in contact with the tissue.
Claim 10
Dependent Claim
14 words
The method according to claim 7 wherein the water-insoluble polymer comprises an acrylonitrile-acrylamide copolymer.
Claim 11
Dependent Claim
15 words
The method according to claim 7 wherein the water-insoluble polymer comprises a crosslinked poly(ethylene oxide).
Claim 12
Dependent Claim
31 words
The method according to claim 7 wherein said drape conforms and adheres to said tissue either self-adhesively or by means of an adhesive interposed between said dressing and said tissue surface.
Claim 13
Dependent Claim
23 words
The method according to claim 10 wherein the inner surface of said drape is tacky whereby said dressing adheres to said surface self-adhesively.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |