US4102995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tar gel formulation
Assignee: Westwood Pharmaceuticals Inc
•
Filing: 1976-05-13
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Granted: 1978-07-25
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Expires: 1996-05-13
Abstract
Abstract A tar formulation used in the treatment of skin disorders containing tar, propylene glycol, ethyl alcohol and a gelling agent e.g. Carbopol 940.
Inventors
- 👤 Peter Hebborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:41
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/042; A61K35/00; A61K35/02; A61K35/04; A61K47/00; A61K47/06; A61K47/08; A61K47/10; A61K47/30; A61K47/32; A61K8/18; A61K8/96; A61K8/97; A61K9/00; A61K9/0012; A61K9/0014; A61Q; A61Q19/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
165 words
A therapeutic aqueous gel composition suitable for treating skin comprising: (a) from about 1 to about 10% by weight of an organic solvent extract of Crude Coal Tar; (b) from about 25% to about 65% by weight of propylene glycol; (c) from about 20% to 35% by weight of ethyl alcohol; (d) from about 0.5% to about 5% by weight of a gelling agent; and (e) from about 5% to 35% water; said gelling agent being a neutralized carboxyl interpolymer of a monomeric monoolefinic acrylic acid of the structure: ##STR2## where R is a substituent selected from the class consisting of hydrogen and lower alkyl groups, and from about 0.1 to about 10% by weight based on the total monomers of a monomeric polyether of an oligosaccharide in which the hydroxyl groups which are modified are etherified with allyl groups, said polyether containing at least two allyl ether groups per oligosaccharide molecule and said interpolymer having a molecular weight of the order of about 1,000,000.
Claim 2
Dependent Claim
165 words
A therapeutic aqueous gel composition suitable for treating skin comprising: (a) from about 1 to about 10% by weight of an organic solvent extract of Crude Coal Tar; (b) from about 25% to about 65% by weight of propylene glycol; (c) from about 20% to 35% by weight of ethyl alcohol; (d) from about 0.5% to about 5% by weight of a gelling agent; and (e) from about 5% to 35% water; said gelling agent being a neutralized carboxyl interpolymer of a monomeric monoolefinic acrylic acid of the structure: ##STR2## where R is a substituent selected from the class consisting of hydrogen and lower alkyl groups, and from about 0.1 to about 10% by weight based on the total monomers of a monomeric polyether of an oligosaccharide in which the hydroxyl groups which are modified are etherified with allyl groups, said polyether containing at least two allyl ether groups per oligosaccharide molecule and said interpolymer having a molecular weight of the order of about 1,000,000.
Claim 3
Dependent Claim
39 words
A composition according to claim 1 in which said organic solvent is selected from the group consisting of isopropyl myristate; PEG-6-dilaurate; polyoxyethylene(4) lauryl ether; propoxylated (15 moles propylene oxide)stearyl ether; polyoxyethylene(10) oleyl ether; polypropylene glycol(5) cetyl ether and glycereth-7-coconate.
Claim 4
Dependent Claim
25 words
A composition according to claim 2 wherein the extract is formed from 60% by weight of solvent and 40% by weight of Crude Coal Tar.
Claim 5
Dependent Claim
10 words
A composition according to claim 1 including a keralytic agent.
Claim 6
Dependent Claim
14 words
A composition according to claim 4 in which the keralytic agent is salicylic acid.
Claim 7
Dependent Claim
9 words
A composition according to claim 1 including a protein.
Claim 8
Dependent Claim
10 words
A composition according to claim 1 including an emulsifying agent.
Claim 9
Dependent Claim
26 words
A composition according to claim 1 in which said organic solvent extract of Crude Coal Tar is present in the amount of about 2% by weight.
Claim 10
Dependent Claim
65 words
A composition according to claim 1 in which said organic solvent extract of Crude Coal Tar, said propylene glycol, said alcohol and said water constitute a composite tar solution making up about 97.25% by weight of said total composition; said propylene glycol comprising about 30% by weight of said composite tar solution and said alcohol comprisng about 32% by weight of said composite tar solution.
Claim 11
Dependent Claim
44 words
A method for treating psoriasis which comprises applying to the effected skin area a therapeutically effective amount of the composition of claim 1, permitting said composition to remain on said affected skin area for about 5 minutes and then removing any excess of material.
Claim 12
Dependent Claim
24 words
The method of claim 10 including the additional step of exposing the skin area to which said composition has been applid to UV radiation.
Claim 13
Dependent Claim
52 words
A method for treating chronic atopic dermatitis, lichen simplex chronicus or nummular eczema which comprises applying to the effected skin area a therapeutically effective amount of the composition of claim 1 permitting said composition to remain on said effected skin area for about 5 minutes and then removing the excess of material.
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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) | 1981-07-24 | 1982-01-23 | 1982-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-24 | 1986-01-23 | 1986-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-24 | 1990-01-23 | 1990-07-25 | $7700.00 | Window Closed / Lapsed |