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:
Nov. 18, 2025
Filed:
Jun. 23, 2020
Toyobo Co., Ltd., Osaka, JP;
Nobuyuki Manabe, Inuyama, JP;
Masayuki Haruta, Inuyama, JP;
TOYOBO CO., LTD., Osaka, JP;
Abstract
Disclosed is a biaxially oriented polyester film that is superior in transparency and easy to perform secondary processing such as coating and vapor deposition, and satisfies performance after the secondary processing. The biaxially oriented polyester film consists of a polyester resin composition including particles, and at least one surface of the film satisfies all of the following requirements (1) to (3): (1) the number of micro protrusions having a height of less than 3 nm per an area of 4×10mof 250 or more and 600 or less; (2) the number of micro protrusions having a height of 3 nm or more per an area of 4×10mof 300 or more and 600 or less; and (3) an arithmetic average height Sa of 0.010 μm or more and 0.025 μm or less.