US4952560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ointment base
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1988-04-11
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Granted: 1990-08-28
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Expires: 2008-04-11
Abstract
Abstract An ointment base for external use is provided which contains a water-soluble protein and monohydric alcohol or/and oleginous substance and additionally contains a wetting agent. The present ointment base offers a markedly improved percutaneous absorption of drugs, as compared with the conventional ointment bases.
Inventors
- 👤 Kazuo Kigasawa
- 👤 Hideaki Ohtani
- 👤 Makoto Tanaka
- 👤 Shigeru Hayashida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:40
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0014; A61K47/00; A61K47/06; A61K47/08; A61K47/10; A61K47/30; A61K47/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
174 words
A method for providing superior percutaneous absorption of a drug or drugs on the skin surface characterized by applying an ointment containing: (1) one or two water soluble proteins for promoting percutaneous absorption of a drug or drugs and being selected from the group consisting of gelatin, casein and soybean protein, in a range of 0.5 to 30 weight % based on the weight of the whole ointment; (2) a monohydric alcohol having a carbon number of 2 to 4, in a range of 1 to 45 weight % based on the weight of the whole ointment; (3) one or two wetting agents selected from the group consisting of alkylene glycol containing 2 to 6 carbon atoms, polyethylene glycol having average molecular weight of about 200 to 800, glycerin, trimethylolpropane and sorbitol, in a range of 1 to 35 weight % based on the weight of the whole ointment; and (4) a drug or drugs absorbed percutaneously in a range of 0.01 to 15 weight % based on the weight of the whole ointment.
Claim 2
Independent Claim
174 words
A method for providing superior percutaneous absorption of a drug or drugs on the skin surface characterized by applying an ointment containing: (1) one or two water soluble proteins for promoting percutaneous absorption of a drug or drugs and being selected from the group consisting of gelatin, casein and soybean protein, in a range of 0.5 to 30 weight % based on the weight of the whole ointment; (2) a monohydric alcohol having a carbon number of 2 to 4, in a range of 1 to 45 weight % based on the weight of the whole ointment; (3) one or two wetting agents selected from the group consisting of alkylene glycol containing 2 to 6 carbon atoms, polyethylene glycol having average molecular weight of about 200 to 800, glycerin, trimethylolpropane and sorbitol, in a range of 1 to 35 weight % based on the weight of the whole ointment; and (4) a drug or drugs absorbed percutaneously in a range of 0.01 to 15 weight % based on the weight of the whole ointment.
Claim 3
Dependent Claim
22 words
A method as claimed in claim 1, said ointment further containing water in a range of from 20 to 50 weight %.
Claim 4
Dependent Claim
64 words
A method as claimed in claim 1, said ointment further containing cellulose derivative, polysaccharide, carboxyvinyl polymer, polyvinyl alcohol or polyvinylpyrrolidone in an amount ranging from about 0.1 to 10 weight %; said cellulose derivative being alkyl cellulose or hydroxy alkyl cellulose having an average molecular weight in the range of about 40,000 to 200,000 and an alkyl moiety containing 1 to 4 carbon atoms.
Claim 5
Dependent Claim
27 words
A method as claimed in claim 1, said ointment further containing nonionic, anionic or cationic surfactant in an amount ranging from about 0.1 to 5 weight %.
Claim 6
Dependent Claim
13 words
A method as claimed in claim 1, wherein the monohydric alcohol is ethanol.
Claim 7
Dependent Claim
22 words
A method as claimed in claim 1, said ointment further containing paraben in an amount of about 0.05 to 2 weight %.
Claim 8
Dependent Claim
39 words
A method as claimed in claim 1, said ointment further containing organic acid, inorganic acid, alkali metal salt of organic acid or alkali metal salt of inorganic acid in an amount of from about 0.1 to 5 weight %.
Claim 9
Dependent Claim
114 words
A method as claimed in claim 1, said ointment further containing one to four oleoginous substances selected from the group consisting of isopropyle myristate, octyldodecyl myristate, myristyl myristate, isopropyl palmitate, butyl stearate, decyl oleate, diisopropyl adipate, diethyl sebacate, hexyldecyl dioctate, sorbitan monopalmitate, saccharose fatty acid ester, triacetin, di- or triglyceride caprylate, di- or triglyceride caprate, mixed trigriceride comprising caprylic acid and capric acid, di- or triglyceride oleate, di- or triglyceride linolate, mixed glyceride comprising oleic acid and linolic acid, cetanol, palmityl alcohol, stearyl alcohol, oleyl alcohol, hexadecyl alcohol, paraffin oil, lanolin oil and silicone oil in a range of from 0.5 to 30 weight % based on the weight of the whole ointment base.
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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) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |