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:
Dec. 13, 2005
Filed:
Sep. 27, 2002
Dennis E. Vogel, Lake Elmo, MN (US);
Kim M. Vogel, Lake Elmo, MN (US);
Dennis E. Vogel, Lake Elmo, MN (US);
Kim M. Vogel, Lake Elmo, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A process for preparing substituted pentacene compounds comprises the step of cyclizing substituted bis(benzyl)phthalic acids using an acid composition comprising trifluoromethanesulfonic acid, the substituted bis(benzyl)phthalic acids being represented by the following general formulas:wherein each R (that is, each of the groups Rthrough R) is independently an electron-donating group, a halogen atom, a hydrogen atom, or a combination thereof.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile