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:
Oct. 20, 2009
Filed:
Feb. 01, 2007
Takayuki Ito, Minami-ashigara, JP;
Sumiaki Yamasaki, Kanagawa, JP;
Toshimitsu Sakuma, Minami-ashigara, JP;
Takayuki Ito, Minami-ashigara, JP;
Sumiaki Yamasaki, Kanagawa, JP;
Toshimitsu Sakuma, Minami-ashigara, JP;
Fujifilm Corporation, Tokyo, JP;
Abstract
A method of producing a spirocyclic acetal compound of formula (II), having subjecting a compound of formula (I) and pentaerythritol to dehydration condensation, in the presence of a solid acid catalyst; and the polymer having a repeating unit represented by formula (III), which is produced using the spirocyclic acetal compound of formula (II): wherein Rrepresents an alkyl, cycloalkyl or aryl group, Q represents a hydrogen atom or an acyl group, L represents a divalent linking group having at least one carbon atom, and n is 0 or 1.