The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 2022
Filed:
Oct. 12, 2018
Fujifilm Corporation, Tokyo, JP;
Toshio Shimada, Ashigarakami-gun, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
An object of the present invention is to provide a microneedle array which is capable of suppressing aggregation of liposomes in a case where a water-soluble polymer is mixed with liposomes during production of the microneedle array and is capable of localizing a drug at a tip of a needle. According to the present invention, provided is a microneedle array including: a sheet; and a plurality of needles which are present on an upper surface of the sheet, in which each needle contains a water-soluble polymer, a drug, a liposome, and a salt, a zeta potential of the liposome is −10 mV or less, the zeta potential is a zeta potential of a liquid obtained by diluting the liposome to 0.1 mg/mL with 10 mmol/L of a phosphoric acid aqueous solution having a pH of 7, and a content of the salt in a portion of each needle which contains the liposome is 2.5 mmol/g or less.