US4511563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clear analgesic gels with reduced tackiness
Assignee: BASF Corp
•
Filing: 1983-07-15
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Granted: 1985-04-16
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Expires: 2003-07-15
Abstract
Abstract The subject invention relates to analgesic gels which comprise 1. from 5 to 15 parts of an analgesic compound; 2. from 10 to 40 parts of a nonionic surfactant which forms a gel in water alone at about 15 to 30 percent by weight based upon the weight of the water plus the weight of the nonionic surfactant; 3. from 5 to 40 parts of glycerin; 4. from 40 to 75 parts of water; and 5. optional ingredients (q.v.) said parts based upon 100 parts of the composition and provided that the weight ratio of nonionic surfactant to water is from 5:1 to 3:1. The subject gels are clear, water soluble and are not tacky when applied to the skin.
Inventors
- 👤 Irving R. Schmolka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:35
CPC Classifications
A; A61; A61K; A61K47/00; A61K47/06; A61K47/08; A61K47/10; A61K9/00; A61K9/0012; A61K9/0014
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
100 words
An analgesic gel which comprises (a) from 5 to 15 parts of an analgesic compound; (b) from 10 to 40 parts of a nonionic surfactant which forms a gel in water alone at about 15 to 30 percent by weight based upon the weight of the water plus the weight of the nonionic surfactant; (c) from 5 to 40 parts of glycerin; (d) from 40 to 75 parts of water; and (e) optional ingredients (q.v.), said parts based upon 100 parts of the composition and provided that the weight ratio of nonionic surfactant to water is from 1:2 to 1:5.
Claim 2
Dependent Claim
100 words
An analgesic gel which comprises (a) from 5 to 15 parts of an analgesic compound; (b) from 10 to 40 parts of a nonionic surfactant which forms a gel in water alone at about 15 to 30 percent by weight based upon the weight of the water plus the weight of the nonionic surfactant; (c) from 5 to 40 parts of glycerin; (d) from 40 to 75 parts of water; and (e) optional ingredients (q.v.), said parts based upon 100 parts of the composition and provided that the weight ratio of nonionic surfactant to water is from 1:2 to 1:5.
Claim 3
Dependent Claim
12 words
The gel of claim 1 wherein the analgesic compound is triethanolamine salicylate.
Claim 4
Dependent Claim
29 words
The gel of claim 1 wherein the nonionic surfactant is selected from the group consisting of polyoxybutylene-polyoxyethylene copolymers, polyoxyethylene-polyoxypropylene copolymers, polyoxyethylated polypropylene glycol adducts of ethylenediamine, and mixtures thereof.
Claim 5
Dependent Claim
29 words
The gel of claim 2 wherein the nonionic surfactant is selected from the group consisting of polyoxybutylene-polyoxyethylene copolymers, polyoxyethylene-polyoxypropylene copolymers, polyoxyethylated polypropylene glycol adducts of ethylenediamine, and mixtures thereof.
Claim 6
Dependent Claim
39 words
The gel of claim 1 wherein the nonionic surfactant is a propylene glycol initiated polyoxypropylene-polyoxyethylene nonionic surfactant having an average polyoxypropylene hydrophobe of about 4,000 and a polyoxyethylene hydrophile content of about 70 percent by weight of the surfactant.
Claim 7
Dependent Claim
39 words
The gel of claim 1 wherein the nonionic surfactant is a propylene glycol initiated polyoxypropylene-polyoxyethylene nonionic surfactant having an average polyoxypropylene hydrophobe of about 3,250 and a polyoxyethylene hydrophile content of about 70 percent by weight of the surfactant.
Claim 8
Dependent Claim
39 words
The gel of claim 1 wherein the nonionic surfactant is an N,N,N',N'-tetrakis(2-hydroxylpropyl)ethylenediamine initiated polyoxypropylene-polyoxyethylene nonionic surfactant having an average polyoxypropylene hydrophobe of 6,500 to 7,000 and a polyoxyethylene hydrophile content of about 80 percent by weight of the surfactant.
Claim 9
Dependent Claim
38 words
The gel of claim 1 wherein the nonionic surfactant is a 1,4-butanediol initiated polyoxybutylene-polyoxyethylene nonionic surfactant having an average polyoxybutylene hydrophobe of about 3,000 and a polyoxyethylene hydrophile content of about 80 percent by weight of the surfactant.
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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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |