US4865844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating tinea pedis and related dermatophytic infections
Assignee: Dow Silicones Corp
•
Filing: 1988-05-20
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Granted: 1989-09-12
•
Expires: 2008-05-20
Abstract
Abstract A therapeutic method of treating the chronic human superficial fungus infection tinea pedis produced by the pathogenic dermatophytic fungi Microsporum sp., Trichophyton sp., and Epidermophyton sp., which invade and attack keratinized skin areas of the body by repeatedly applying topically to the itching, macerated, cracked, and scaling skin areas of the body at the site of the infection a fungicidally effective amount of a silane-containing lotion antagonistic to the dermatophytic fungi in order to exert at least an inhibitory growth effect upon the dermatophytes.
Inventors
- 👤 Lynne B. Blank
- 👤 Richard L. Gettings
- 👤 William C. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:31
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/695; A61P; A61P17/00; A61P31/00; A61P31/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
222 words
A therapeutic method of treating the chronic human superficial fungus infection tinea pedis produced by the pathogenic dermatophytic fungi Microsporum sp., Trichophyton sp., and Epidermophyton sp., which invade and attack keratinized skin areas of the body comprising repeatedly applying topically to itching, macerated, cracked, and scaling skin areas of the body at the site of the infection, a fungicidally effective amount of a carrier antagonistic to the dermatophytic fungi, in order to exert at least an inhibitory growth effect upon the dermatophytes, the carrier including an antimicrobial organosilane having the general formula selected from the group consisting of ##STR4## wherein, in each formula, R is an alkyl radical of 1 to 4 carbon atoms or hydrogen; a has a value of 0, 1 or 2; R' is a methyl or ethyl radical; R" is an alkylene group of 1 to 4 carbon atoms; R'", R"" and R v are each independently selected from a group consisting of alkyl radicals of 1 to 18 carbon atoms, --CH 2 C 6 H 5 , --CH 2 CH 2 OH, --CH 2 OH, and --(CH 2 ) x NHC(O)R vi , wherein x has a value of from 2 to 10 and R vi is a perfluoroalkyl radical having from 1 to 12 carbon atoms; and X is chloride, bromide, fluoride, iodide, acetate or tosylate.
Claim 2
Dependent Claim
222 words
A therapeutic method of treating the chronic human superficial fungus infection tinea pedis produced by the pathogenic dermatophytic fungi Microsporum sp., Trichophyton sp., and Epidermophyton sp., which invade and attack keratinized skin areas of the body comprising repeatedly applying topically to itching, macerated, cracked, and scaling skin areas of the body at the site of the infection, a fungicidally effective amount of a carrier antagonistic to the dermatophytic fungi, in order to exert at least an inhibitory growth effect upon the dermatophytes, the carrier including an antimicrobial organosilane having the general formula selected from the group consisting of ##STR4## wherein, in each formula, R is an alkyl radical of 1 to 4 carbon atoms or hydrogen; a has a value of 0, 1 or 2; R' is a methyl or ethyl radical; R" is an alkylene group of 1 to 4 carbon atoms; R'", R"" and R v are each independently selected from a group consisting of alkyl radicals of 1 to 18 carbon atoms, --CH 2 C 6 H 5 , --CH 2 CH 2 OH, --CH 2 OH, and --(CH 2 ) x NHC(O)R vi , wherein x has a value of from 2 to 10 and R vi is a perfluoroalkyl radical having from 1 to 12 carbon atoms; and X is chloride, bromide, fluoride, iodide, acetate or tosylate.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein the carrier is selected from the group consisting of gels, powders, lotions, creams, emulsions, microemulsions, and solvent solutions of the organosilane.
Claim 4
Dependent Claim
49 words
The method of claim 2 wherein the carrier is a lotion and the lotion includes in addition to the organosilane each of talc, treithanolamine, propylene glycol, a suspension agent of a polymer of acrylic acid cross-linked with allyl sucrose, water, glyceryl stearate, lanolin alcohol, mineral oil, and stearic acid.
Claim 5
Dependent Claim
44 words
The method of claim 2 wherein the carrier is a lotion and the lotion includes in addition to the silane each of methyl cellulose, talc, propylene glycol, water, glyceryl stearate, lanolin alcohol, mineral oil, stearic acid, and a low viscosity fluid blend of polydimethylcyclosiloxanes.
Claim 6
Dependent Claim
21 words
The method of claim 3 wherein the organosilane is represented by the formula (CH.sub.3 O).sub.3 Si(CH.sub.2).sub.3 N.sup.+ (CH.sub.3).sub.2 C.sub.18 H.sub.37 Cl.sup.-
Claim 7
Dependent Claim
21 words
The method of claim 4 wherein the organosilane is represented by the formula (CH.sub.3 O).sub.3 Si(CH.sub.2).sub.3 N.sup.+ (CH.sub.3).sub.2 C.sub.18 H.sub.37 Cl.sup.-
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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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |