You're using a free limited version of DrugPatentWatch: Upgrade for Complete Access

Last Updated: November 4, 2024

Claims for Patent: 5,607,979

✉ Email this page to a colleague

« Back to Dashboard

Summary for Patent: 5,607,979

Title:	Topical skin protectants
Abstract:	Creams formed from about 35% to about 50% fine particulates of certain poly(tetrafluoroethylene) (PTFE) resins dispersed in perfluorinated polyether oils having viscosities from about 20 cSt to about 350 cSt afford good protection against chemical warfare agents such as sulfur mustard (HD), lewisite (L), sulfur mustard/Lewisite mixtures (HL), pinacolyl methylphosphonofluoridate (soman or GD), thickened soman (TGD) and O-ethyl S-2-diisopropylaminoethyl methylphosphonothiolate (vx).
Inventor(s):	McCreery; Michael J. (Xenia, OH)
Assignee:	The United States of America as represented by the Secretary of the Army (Washington, DC)
Application Number:	08/453,715
Patent Claims:	1. A topical skin protectant composition which comprises a dispersion of from at least 35% to about 50% by weight of finely divided polytetrafluoroethylene having a surface area below about 6 M.sup.2 /g in a liquid perfluorinated polyether having a viscosity between about 20 cSt and about 350 cSt. 2. The composition of claim 1 wherein at least 90% of the finely divided polytetrafluoroethylene has a particle size below about 5.mu.. 3. The composition of claim 1 wherein the perfluorinated polyether is based on perfluoropropylene oxide. 4. The composition of claim 1 wherein the polytetrafluoroethylene has a surface area below about 4 M.sup.2 /g. 5. The composition of claim 1 wherein the polytetrafluoroethylene has a surface area below about 4 M.sup.2 /g and at least 90% has a particle size below about 5.mu.. 6. A topical skin protectant composition which comprises a dispersion of from at least 35% to about 50% by weight of finely divided polytetrafluoroethylene having a surface area below about 6 M.sup.2 /g in a liquid perfluorinated polyether having a viscosity between about 20 cSt and about 350 cSt. 7. The composition of claim 6 wherein at least 90% of the finely divided polytetrafluoroethylene has a particle size below about 5.mu.. 8. The composition of claim 6 wherein the perfluorinated polyether is based on perfluoropropylene oxide. 9. The composition of claim 6 wherein the polytetrafluoroethylene has a surface area below about 4 M.sup.2 /g. 10. The composition of claim 6 wherein the polytetrafluoroethylene has a surface area below about 4 M.sup.2 /g and at least 90% has a particle size below about 5.mu.. 11. A process for preparing a topical skin protectant composition which comprises subjecting a mixture of from at least 35% to about 50% by weight finely divided polytetrafluoroethylene having a surface area below about 6 M.sup.2 /g in a perfluorinated polyether having a viscosity between about 20 cSt and about 350 cSt to high shear mixing.

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.