Patent US1851326A successfully refreshed from Google Patents.
US4668564A
Expired / Lapsed
US
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Hydrogel materials for hot and cold therapy and method for forming same
Assignee: Bank of America NA
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Filing: 1986-01-31
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Granted: 1987-05-26
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Expires: 2006-01-31
Abstract
Abstract A hot or cold compress a layer of substituted urea/urethane hydrogel material bonded to a porous substrate. The hydrogel material is made up of a high molecular weight polyol, a toluene diisocyanate prepolymer and water. Generally, the water and polyol each comprises between about 40 to 50% by weight of the hydrogel, with the diisocyanate prepolymer making up the remaining 12-16% by weight. The hot or cold compresses of the present invention are formed by preparing the hydrogel material and then placing a porous substrate in contact with the hydrogel prior to the time that gel formation is complete. In this manner, the hydrogel becomes integrally bonded to the porous substrate. Other materials such as terrycloth can be bonded to the porous substrate prior to bonding the substrate to the hydrogel. Articles useful in therapy can then be formed by attaching the edges of the cloth/porous substrate to form the desired object.
Inventors
- 👤 Lewis P. Orchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:44
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; A; A61; A61F; A61F7/00; A61F7/02; A61K; A61K47/00; A61K47/30; A61K47/34; A61K9/00; A61K9/70; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/60; A61L26/00; A61L26/0009; A61L26/0019; A61L26/0061; A61L26/008; B32B5/18; B32B5/245; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; F; F25; F25D; F25D3/00; F25D3/02; F25D3/06; F25D3/08; B32B2266/00; B32B2266/06; B32B2307/00; B32B2307/30; C08G2210/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/249981; Y10T442/00; Y10T442/30; Y10T442/3325; Y10T442/3366
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
63 words
A hot or cold compress comprising a layer of a substituted urea/urethane hydrogel material bonded to first side of a porous substrate and absent the opposing side of said substrate, said layer of hydrogel comprising between approximately 20 to 80% weight water, approximately 10 to 60% by weight of a weight polyol and approximately 10 to 20% by weight of a diisocyanate prepolymer.
Claim 2
Dependent Claim
63 words
A hot or cold compress comprising a layer of a substituted urea/urethane hydrogel material bonded to first side of a porous substrate and absent the opposing side of said substrate, said layer of hydrogel comprising between approximately 20 to 80% weight water, approximately 10 to 60% by weight of a weight polyol and approximately 10 to 20% by weight of a diisocyanate prepolymer.
Claim 3
Dependent Claim
52 words
The compress of claim 1 wherein said water is present in an amount of between about 40 to 50% by weight, said polyol is present in an amount of between about 10 to 50% by weight and said diisocyanate prepolymer is present in an amount between about 10 to 20% by weight.
Claim 4
Dependent Claim
42 words
The compress of claim 2 wherein said water and said polyol are present in an amount of between about 40 to about 50% by weight and said diisocyanate prepolymer is present in an amount of between about 12 to 16% by weight.
Claim 5
Dependent Claim
35 words
The compress of claim 3 wherein said water and said polyol are present in an amount of about 43% by weight and said diisocyanate prepolymer is present in an amount of about 14% by weight.
Claim 6
Dependent Claim
15 words
The compress of claim 1 wherein said porous substrate commprises a substantially open-celled foam material.
Claim 7
Dependent Claim
15 words
The compress of claim 1 wherein said porous substrate comprises a polyether-based, recticulated urethane foam.
Claim 8
Dependent Claim
14 words
The compress of claim 1 wherein said porous substrate comprises a polyester-based urethane foam.
Claim 9
Dependent Claim
25 words
The compress of claim 1 wherein said polyol is selected from the group comprising propylene glycol, dipropylene glycol, ethylene glycol, diethylene glycol or mixtures thereof.
Claim 10
Dependent Claim
11 words
The compress of claim 8 wherein the polyol is propylene glycol.
Claim 11
Dependent Claim
14 words
The compress of claim 1 wherein the diisocyanate prepolymer comprises a toluene diisocyanate prepolymer.
Claim 12
Dependent Claim
20 words
The compress of claim 1 wherein the porous substrate further comprises a layer of cloth bonded to said porous substrate.
Claim 13
Dependent Claim
17 words
The compress of claim 1 wherein said compress is configured in the shape of a stocking cap.
Claim 14
Dependent Claim
16 words
The compress of claim 1 wherein the compress is configured in the shape of a mitten.
Claim 15
Dependent Claim
21 words
The compress of claim 1 wherein said compress is a rectangular solid having means for attaching said compress to a head.
Claim 16
Dependent Claim
13 words
The compress of claim 1 wherein said hydrogel material is impregnated with medication.
Claim 17
Dependent Claim
34 words
The compress of claim 15 wherein said medication is methylsalycilate and wherein said substrate is configured in the shape of a strap useful for applying said compress to a portion of a wearer's body.
Claim 18
Independent Claim
95 words
A method for forming objects having a substituted urea/urethane hydrogel layer bonded to a first side of a layer of porous substrate and absent the opposing side of said substrate, comprising: preparing said hydrogel material; contacting said first side of porous substrate with said hydrogel material prior to complete gel formation of said hydrogel; maintaining said layer of porous substrate in contact with said hydrogel material until gel formation is substantially complete, thereby bonding said porous substrate material to the hydrogel material; and forming a desired object from said hydrogel bonded to said porous substrate.
Claim 19
Independent Claim
95 words
A method for forming objects having a substituted urea/urethane hydrogel layer bonded to a first side of a layer of porous substrate and absent the opposing side of said substrate, comprising: preparing said hydrogel material; contacting said first side of porous substrate with said hydrogel material prior to complete gel formation of said hydrogel; maintaining said layer of porous substrate in contact with said hydrogel material until gel formation is substantially complete, thereby bonding said porous substrate material to the hydrogel material; and forming a desired object from said hydrogel bonded to said porous substrate.
Claim 20
Dependent Claim
27 words
The method of claim 17 further comprising introducing said hydrogel material into a mold having a desired shape prior to contacting said porous substrate with said hydrogel.
Claim 21
Dependent Claim
51 words
The method of claim 17 wherein said hydrogel is prepared by mixing between approximately 10 to 20% by weight of a diisocyanate prepolymer with approximately 10 to 60% by weight of a high molecular weight polyol, and then adding between approximately 20 to 80% by weight water to said diisocyanate/polyol mixture.
Claim 22
Dependent Claim
53 words
The method of claim 19 wherein said diisocyanate prepolymer is present in an amount of between about 10 to 20% by weight, said polyol is present in an amount of between about 10 to 50% by weight and said water is present in an amount of between about 40 to 50% by weight.
Claim 23
Dependent Claim
40 words
The method of claim 19 wherein said prepolymer is present in an amount of between about 12 to 15% by weight and said water and said polyol are present in an amount of between about 40 to 50% by weight.
Claim 24
Dependent Claim
34 words
The method of claim 19 wherein said prepolymer is present in an amount of about 14% by weight and said water and said polyol are present in an amount of approximately 43% by weight.
Claim 25
Dependent Claim
15 words
The method of claim 17 wherein said porous substrate comprises a substantially open-celled foam material.
Claim 26
Dependent Claim
13 words
The method of claim 17 wherein said porous substrate comprises a urethane foam.
Claim 27
Dependent Claim
15 words
The method of claim 17 wherein said porous substrate is a polyether-based, recticulated urethane foam.
Claim 28
Dependent Claim
14 words
The method of claim 17 wherein said porous substrate is a polyester-based urethane foam.
Claim 29
Dependent Claim
25 words
The method of claim 19 wherein said polyol is selected from the group comprising propylene glycol, dipropylene glycol, ethylene glycol, diethylene glycol, or mixtures thereof.
Claim 30
Dependent Claim
11 words
The method of claim 27 wherein said polyol is propylene glycol.
Claim 31
Dependent Claim
14 words
The method of claim 19 wherein said diisocyanate prepolymer comprises a toluene diisocyanate prepolymer.
Claim 32
Dependent Claim
16 words
The method of claim 17 wherein said porous substrate further comprises a cloth material bonded thereto.
Claim 33
Dependent Claim
11 words
The method of claim 30 wherein said cloth material is terrycloth.
Claim 34
Dependent Claim
13 words
The method of claim 17 wherein the desired object is a stocking cap.
Claim 35
Dependent Claim
11 words
The method of claim 17 wherein the object is a mitten.
Claim 36
Dependent Claim
22 words
The method of claim 17 wherein the object is a rectangular solid having means for attaching said rectangular solid to a head.
Claim 37
Dependent Claim
13 words
The method of claim 17 further comprising impregnating said hydrogel material with medication.
Claim 38
Dependent Claim
10 words
The method of claim 35 wherein said medication is methylsilicylate.
Claim 39
Dependent Claim
10 words
The product formed by the process recited in claim 17.
Claim 40
Dependent Claim
10 words
The product formed by the process recited in claim 19.
Claim 41
Dependent Claim
10 words
The product formed by the process recited in claim 22.
Claim 42
Independent Claim
76 words
A method for bonding a substituted urea/urethane hydrogel material to a first side of a porous substrate material and absent the opposing side of said substrate comprising: contacting said porous substrate material with said hydrogel material prior to the time that said hydrogel material has completely gelled; and maintaining said porous substrate in contact with said hydrogel material until gel formation of the hydrogel is substantially complete, thereby bonding the porous substrate to the hydrogel material.
Claim 43
Independent Claim
76 words
A method for bonding a substituted urea/urethane hydrogel material to a first side of a porous substrate material and absent the opposing side of said substrate comprising: contacting said porous substrate material with said hydrogel material prior to the time that said hydrogel material has completely gelled; and maintaining said porous substrate in contact with said hydrogel material until gel formation of the hydrogel is substantially complete, thereby bonding the porous substrate to the hydrogel material.
Claim 44
Dependent Claim
15 words
The method of claim 40 wherein said porous substrate material comprises a substantially open-celled foam.
Claim 45
Dependent Claim
14 words
The method of claim 40 wherein the porous substrate is a polyether-based, recticulated foam.
Claim 46
Dependent Claim
13 words
The method of claim 40 wherein the foam is a polyester-based urethane foam.
Claim 47
Dependent Claim
16 words
The method of claim 40 wherein said form has a layer of cloth material bonded thereto.
Claim 48
Dependent Claim
15 words
The method of claim 44 wherein said cloth material is flame bonded to said foam.
References Cited (Backward Citations)
US3674027A
Cited
US3847722A
Cited
US4362841A
Cited
US4349494A
Cited
US4341207A
Cited
US4423099A
Cited
US4452892A
Cited
US4355021A
Cited
US4377160A
Cited
US4404296A
Cited
US4383079A
Cited
US4425917A
Cited
US4517326A
Cited
US4353955A
Cited
US4530220A
Cited
US4556055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |