Silicone vesicles and entrapment
Patent 5364633 Issued on November 15, 1994. Estimated Expiration Date: 
March 14, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 14, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesLarge unilamellar vesicles (LUV) and method of preparing same Method for an effective moisturizing treatment of the skin, particularly useful in cosmetics applications Process for the preparation of dispersible colloidal systems of a substance in the form of nanoparticles Paucilamellar lipid vesicles Spontaneous equilbrium surfactant vesicles Surface-modifiable liposome and process for producing surface-modified liposome Patent #: 5190822 InventorsAssigneeApplicationNo. 212753 filed on 03/14/1994US Classes:424/450, Liposomes264/4.1, Liquid encapsulation utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)424/59, TOPICAL SUN OR RADIATION SCREENING, OR TANNING PREPARATIONS424/64, Lip424/76.1, DEODORANTS (NONBODY)428/402.2, Microcapsule with fluid core (includes liposome)514/841, CONTRACEPTIVE514/844, COSMETIC, FACIAL521/76Preparing a cellular product utilizing a stated ingredient which is surface coated or is a discrete solid particle containing a fluid encapsulated therein, processes of forming an expandible composition, containing said stated ingredient or composition therefromExaminersPrimary: Foelak, MortonAttorney, Agent or FirmInternational ClassesA61K 009/51A61K 037/22 AbstractA method of entrapping a water-soluble substance in vesicles formed from a siloxane surfactant is carried out by dissolving the substance to be entrapped in water, adding a siloxane surfactant, mildly agitating the mixture, and removing excess of water and substance. Water-insoluble substances can be entrapped in the vesicles by dissolving the substance to be entrapped in the siloxane surfactant, and mildly agitating the substance and the siloxane surfactant. Suitable siloxane surfactants are R--[Si(Me)2 O]14 --Si(Me)2 --R in which R is --(CH2)3 (OCH2 CH2)7 OH, R--[Si(Me)2 O]14 --Si(Me)2 --R in which R is --(CH2)3 (OCH2 CH2)12 OH, Me3 SiO[Si(Me)2 O]22 --[SiMeRO]2 --SiMe3 in which R is --(CH2)3 (OCH2 CH2)12 OH, and Me3 SiO[Si(Me)2 O]103 --[SiMeRO]10 --SiMe3 in which R is --(CH2)3 (OCH2 CH2)12 OH.Other References
Field of SearchLiquid encapsulation utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)Liposomes Lip TOPICAL SUN OR RADIATION SCREENING, OR TANNING PREPARATIONS DEODORANTS (NONBODY) Microcapsule with fluid core (includes liposome) CONTRACEPTIVE COSMETIC, FACIAL Preparing a cellular product utilizing a stated ingredient which is surface coated or is a discrete solid particle containing a fluid encapsulated therein, processes of forming an expandible composition, containing said stated ingredient or composition therefrom | |
