Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/58—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing atoms other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur or phosphorus
  • A61K8/585—Organosilicon compounds
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/04—Dispersions; Emulsions
  • A61K8/06—Emulsions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/04—Dispersions; Emulsions
  • A61K8/06—Emulsions
  • A61K8/068—Microemulsions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/31—Hydrocarbons
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/34—Alcohols
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/34—Alcohols
  • A61K8/342—Alcohols having more than seven atoms in an unbroken chain
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/34—Alcohols
  • A61K8/345—Alcohols containing more than one hydroxy group
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/39—Derivatives containing from 2 to 10 oxyalkylene groups
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
  • A61K8/86—Polyethers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
  • A61K8/89—Polysiloxanes
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
  • A61K8/89—Polysiloxanes
  • A61K8/891—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
  • A61Q19/007—Preparations for dry skin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair

Definitions

• the present invention relates to a fine emulsion-type cosmetic and a production method thereof, particularly to the preparation of surfactants therefor.
• oil-in-water emulsion compositions particularly, those having small-size oil droplets as the inner phase and exhibiting a transparent appearance are referred to as fine emulsions.
• fine emulsions When an oil agent is blended to a luxurious lotion or the like, the appearance of the cosmetic comprising such emulsion does not degrade, and thus, a commercially valuable cosmetic that combines an appearance having excellent transparency and the functionality and feeling in use of the oil agent can be provided.
• These fine emulsions are generally produced by pulverizing emulsified particles of an emulsion with high shearing force using an emulsifying apparatus capable of applying high shearing force, such as high-pressure emulsifying apparatuses.
• fine emulsion preparation by means of such a high-pressure emulsifying apparatus leads to an increase in the production cost, and treatment with high shearing force may causes deterioration in various functional raw materials.
• microemulsion a fine emulsion in thermodynamic equilibrium is referred to as a microemulsion.
• the present invention has been made in view of the conventional art, and the problem to be solved is to provide a fine emulsion-type cosmetic comprising a finely-emulsified oil phase mainly based on a silicone oil or hydrocarbon oil without use of a high-pressure emulsifying apparatus.
• the present inventors have made investigations to solve the problem and, as a result, found that use of a specific carboxy-modified silicone can easily provide a fine emulsion-type cosmetic, via a microemulsion phase in course of the process, having completed the present invention.
• a cosmetic that is: a fine emulsion-type cosmetic having an average emulsion particle size of 150 nm or less and comprises: an aqueous phase that is a continuous layer; an oil phase dispersed in the aqueous phase that comprises at least 82% by mass of an oil consisting of a silicone oil and a hydrocarbon oil therein; a carboxy-modified silicone represented by the following formula (1); a C16 to 22 higher alcohol; a nonionic surfactant having a POE chain and an HLB of 5 to 10; and a dihydric glycol;
• R1 and R2 are respectively a functional group represented by —O—Si(R 4 ) 3 in which R 4 is an alkyl group having 1 to 6 carbon atoms; R 3 is a monovalent hydrocarbon group having 1 to 10 carbon atoms; M is a hydrogen atom, metal atom, or organic cation; A is a linear or branched alkylene group represented by C q H 2q ; and q is an integer of 6 to 20.
• the mass ratio of the silicone to hydrocarbon oil in the oil phase is preferably 1:9 to 9:1.
• the mass ratio of (oil agent)/(carboxy-modified silicone+higher alcohol+nonionic surfactant) is preferably 1.5 or less.
• a method of producing a fine emulsion-type cosmetic according to the present invention comprising steps of; preparing a microemulsion by mixing the acid moiety of a carboxy-modified silicone represented by the formula (1), a higher alcohol, a nonionic surfactant, an oil phase, an organic amine and/or alkali metal, a portion of an aqueous phase, and dihydric glycol; and adding the rest of the aqueous phase to the microemulsion and diluting the microemulsion.
• the cosmetic according to the present invention which contains a specific carboxy-modified silicone, a higher alcohol, and a nonionic surfactant, can easily become a fine emulsion composition without being carried out high-pressure emulsification or the like.
• the carboxy-modified silicone used in the present invention is a compound represented by the formula (1):
• the carboxy-modified silicone represented by the formula (1) is a carboxy-modified silicone modified with an alkylcarboxyl group, characterized by containing a total of 2 to 20 silicon atoms on average per molecule.
• R 1 to R 3 is a functional group represented by —O—Si(R 4 ) 3 in which R 4 is either an alkyl group having 1 to 6 carbon atoms or a phenyl group. All of R 1 to R 3 may be either of the above functional groups. Alternatively, when at least one of R 1 to R 3 is the above functional group, the rest of R 1 to R 3 may be either substituted or unsubstituted monovalent hydrocarbon groups, which may be the same or different.
• R 4 is either an alkyl group having 1 to 6 carbon atoms or a phenyl group.
• alkyl group having 1 to 6 carbon atoms include linear-chain, branched, or cyclic alkyl groups such as methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, s-butyl, t-butyl, pentyl, neopentyl, cyclopentyl, and hexyl.
• Examples of the functional group represented by —O—Si(R 4 ) 3 include —O—Si(CH 3 ) 3 , —O—Si(CH 3 ) 2 (C 2 H 5 ), —O—Si(CH 3 ) 2 (C 3 H 7 ), —O—Si(CH 3 ) 2 (C 4 H 9 ), —O—Si(CH 3 ) 2 (C 5 H 11 ), —O—Si(CH 3 ) 2 (C 6 H 13 ), and —O—Si(CH 3 ) 2 (C 6 H 5 ).
• the functional group is preferably a trialkylsiloxy group, most preferably a trimethylsiloxy group.
• R 1 to R 3 in the formula (1) is the functional group represented by —O—Si(R 4 ) 3
• the others of R 1 to R 3 may be either substituted or unsubstituted monovalent hydrocarbon groups, which may be the same or different.
• Examples of the unsubstituted monovalent hydrocarbon group as R 1 to R 3 include linear-chain, branched, or cyclic alkyl groups such as methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, s-butyl, pentyl, neopentyl, cyclopentyl, and hexyl; aryl groups such as phenyl, tolyl, and xylyl groups: and aralkyl groups.
• Examples of the substituted monovalent hydrocarbon group as R 1 to R 3 include perfluoroalkyl groups such as 3,3,3-trifluoropropyl and 3,3,4,4,4-pentafluorobutyl groups; aminoalkyl groups such as 3-aminopropyl and 3-(aminoethyl)aminopropyl groups; and amidoalkyl groups such as acetylaminoalkyl groups.
• a portion of the hydrocarbon group of R 1 to R 3 may be substituted with a hydroxyl group, alkoxy group, polyether group, or perfluoropolyether group.
• Examples of the alkoxy group include methoxy, ethoxy, and propoxy groups.
• R 1 to R 3 in the formula (1) is/are the functional group(s) represented by —O—Si(R 4 ) 3
• the other(s) of R 1 to R 3 is/are preferably a linear-chain or branched alkyl group(s) having 1 to 6 carbon atoms, particularly preferably a methyl group(s) or ethyl group(s).
• all or two of R 1 to R 3 in the formula (1) are preferably the functional groups represented by —O—Si(R 4 ) 3
• the other of R 1 to R 3 is preferably a methyl or ethyl group.
• M is a hydrogen atom, metal atom, or organic cation.
• the metal atom include monovalent alkali metals, divalent alkali metals, and di- or higher valent metal atoms.
• the monovalent alkali metal include, Li, Na, and K
• examples of the divalent alkali metal include Mg, Ca, and Ba
• other examples include Mn, Fe, Co, Al, Ni, Cu, V, Mo, Nb, Zn, and Ti.
• the organic cation include ammonium, monoethanolammonium, triethanolammonium, arginine-neutralized, and aminomethyl propanol (AMP)-neutralized ions.
• M is particularly preferably a hydrogen atom or monovalent alkali metal or may be a mixture thereof.
• A is a linear-chain or branched-chain alkylene group represented by C q H 2q , and q is an integer of 0 to 20.
• the carboxy-modified silicone represented by the formula (1) is a compound represented by the following formula (1′)(below), and the carboxyl-modified group is bonded with silicon via an ethylene group.
• q is preferably 2 to 15, more preferably 6 to 12. In contrast, when the value of q exceeds the upper limit, the feeling in use may be poor.
• the carboxy-modified silicone represented by the formula (1) is characterized by containing a total of 2 to 20 silicon atoms on average per molecule.
• the carboxy-modified silicone contains preferably a total of 3 to 18 silicon atoms, particularly preferably a total of 3 to 7 silicon atoms on average.
• the carboxy-modified silicone represented by the formula (1) that can be used preferably is more specifically a carboxy-modified silicone wherein R 1 and R 2 each are a functional group represented by —O—Si(R 4 ) 3 in which R 4 is an alkyl group having 1 to 6 carbon atoms; R 3 is a linear-chain or branched alkyl group having 1 to 6 carbon atoms; and q has a value of 6 to 12.
• the monohydric aliphatic alcohol having 16 to 22 carbon atoms used in the present invention (hereinafter it is also referred to as a higher alcohol simply) is a saturated or unsaturated monohydric aliphatic alcohol.
• the alcohol can be either linear-chain or branched, more preferably linear-chain. Additionally, the alcohol is preferably a higher alcohol having a melting point of 40° C. or more.
• Examples of the higher alcohol having 16 to 22 carbon atoms used in the present invention include stearyl alcohol, isostearyl alcohol, oleyl alcohol, octyl dodecanol, chimyl alcohol, cetanol, cetostearyl alcohol, hexyl decanol, and behenyl alcohol.
• it is preferred that a higher alcohol having a melting point of 40 to 80° C. is singly used or a combination of a plurality of higher alcohols is used so as to achieve a melting point of 40 to 70° C.
• An amount of the higher alcohol added is preferably 2 to 10% by mass, more preferably 3 to 8% by mass in the composition, in the stage of preparing the fine emulsion.
• a preferable nonionic surfactant used in the present invention has an HLB of 5 to 10, preferably an HLB of 6 to 9 and has a POE group.
• PEG-5 glyceryl stearate PEG-5 glyceryl stearate
• POE (6) stearyl ether POE (10) hydrogenated castor oil
• POE (20) hydrogenated castor oil PEG-5 glyceryl stearate
• An amount of the nonionic surfactant added is preferably 2 to 15% by mass, more preferably 5 to 10% by mass in the composition in the stage of preparing the fine emulsion.
• dihydric glycol used in the present invention examples include dipropylene glycol, ethylene glycol, diethylene glycol, propylene glycol, and 1,3-butylene glycol.
• the dihydric glycol is present preferably in an amount of 10 to 30% by mass, more preferably 15 to 25% by mass in the composition, in the stage of preparing the fine emulsion.
• the oil agent used as the oil phase of the present invention contains a silicone oil and a hydrocarbon oil.
• silicone oil examples include linear silicones such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane; and cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.
• hydrocarbon oil examples include liquid paraffin, squalane, squalene, paraffin, isoparaffin, and ceresin.
• the silicone oil and the hydrocarbon oil constitute 82% by mass or more of the oil phase.
• the oil phase contains 18% by mass or more of an oil other than silicone or hydrocarbon oils, such as an ester oil, it is difficult to prepare the fine emulsion.
• the formulation amount of the oil phase blended in the step of preparing the fine emulsion preferably provides the ratio, oil agent/(carboxy-modified silicone+higher alcohol+nonionic surfactant), is 1.5 or less.
• the ratio exceeds 1.5, it may be difficult to prepare the fine emulsion.
• the amount of the oil agent blended is no particular lower limit on the amount of the oil agent blended.
• the amount thereof is preferably 10% by mass or more in the composition, in the stage of preparing the fine emulsion.
• oils, waxes, moisturizers, emulsifiers, surfactants, thickeners, gelling agents, metal soaps, water-soluble polymers, oil-soluble polymers, drugs, antioxidants, pigments, dyes, pearlescent agents, lame agents, organic/inorganic powders, and fragrances can be blended as needed, within a qualitative/quantitative range that does not impair the effects of the present invention.
• the use application of the cosmetic of the present invention is not particularly limited, and the cosmetic is particularly preferably used in lotions with respect to its properties.
• the cosmetic can be also used in various cosmetics, for example, skin care cosmetics such as moisture cream, moisture milky lotion, moisture lotion, massage cream, massage lotion, and essence; hair care cosmetics such as hair cream, hair lotion, and hair dressing; body care cosmetics such as sun screen, body cream, and body lotion; make-up cosmetics such as lipstick, mascara, eye liner, nail enamel, liquid foundation, and gel foundation; and cleansers such as makeup remover, shampoo, rinse, and two-in-one shampoo.
• skin care cosmetics such as moisture cream, moisture milky lotion, moisture lotion, massage cream, massage lotion, and essence
• hair care cosmetics such as hair cream, hair lotion, and hair dressing
• body care cosmetics such as sun screen, body cream, and body lotion
• make-up cosmetics such as lipstick, mascara, eye liner, nail enamel, liquid foundation, and gel foundation
• cleansers such as makeup remover, shampoo, rinse
• the present inventors attempted to prepare the fine emulsion using various compositions.
• an attempt to emulsify an oil phase was made using an anionic surfactant as the major surfactant, and additionally, a higher alcohol, a nonionic surfactant, and dihydric glycol.
• an oil agent together with the surfactant (acid moiety), higher alcohol, nonionic surfactant and dihydric glycol were dissolved and mixed at 80° C.
• an aqueous phase (at room temperature) in which an equivalent of triethanolamine as the counter ions of the surfactant was dissolved was added and mixed thereto, and the mixture was cooled. Then, the state of the phases was checked at 55 to 65° C.
• test example 1-1 in which a carboxy-modified silicone is used, provides a substantially transparent one-phase system.
• silicone oil polydimethylsiloxane 6CS
• hydrocarbon oil olefin oligomer
• test examples 1-2 and 1-3 an attempt to prepare an emulsion using a fatty acid (stearic acid or oleic acid) was made, but a white turbid two-phase system was obtained.
• a fatty acid stearic acid or oleic acid
• test example 1-4 when an attempt to prepare the fine emulsion of test example 1-2 (system in which stearic acid is used as the surfactant) using high-pressure emulsification, it was possible to prepare the emulsion.
• the amount of the oil agent blended closely relates to the amounts of the higher alcohol (behenyl alcohol), nonionic surfactant (PEG-5 glyceryl stearate), and carboxy-modified silicone and that an amount of the oil agent blended/(carboxy-modified silicone+higher alcohol+nonionic surfactant) of 1.5 or less enables a good microemulsion to be prepared.
• the higher alcohol behenyl alcohol
• nonionic surfactant PEG-5 glyceryl stearate
• carboxy-modified silicone an amount of the oil agent blended/(carboxy-modified silicone+higher alcohol+nonionic surfactant) of 1.5 or less enables a good microemulsion to be prepared.
• the microemulsion obtained as the similar manner, a second aqueous phase, and a third aqueous phase was added for dilution to prepare a lotion-type composition.
• nonionic surfactants having a POE chain and having an HLB of 5 to 10, preferably 6 to 9 enables good microemulsions to be prepared.
• blending of dihydric glycol is useful for preparing a good microemulsion, but it is not possible to obtain a microemulsion in a range such that the content of dihydric glycol exceeds 30% by mass in the step of microemulsion preparation.
• the second aqueous phase and the third aqueous phase are intended to dilute and disperse the microemulsion.
• addition of dihydric glycol or the like to the second aqueous phase or the third aqueous phase would not adversely affect the state of the microemulsion.
• an organic amine triethanolamine
• alkali metal potassium
• the degree of neutralization is not required to be 100%. Accordingly, the pH required for the product can be prioritized upon preparation.
• Components 1 to 5 are mixed at 25° C. for dissolution.
• Components 6 to 11 are dissolved and mixed at 70° C.
• the obtained lotion contains emulsified particles of 71 nm and provides a pH of 8.07 and an L value of 66.
• the obtained lotion contains emulsified particles of 71 nm and provides a pH of 8.07 and an L value of 66.

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• 2015
  • 2015-09-29 JP JP2015191487A patent/JP6110450B1/ja active Active
• 2016
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