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:
Jan. 11, 2011
Filed:
Sep. 29, 2008
Venkata Rama Narayanan Ganapathy Bhotla, Karnataka, IN;
Shivappa Basappa Halligudi, Pune, IN;
Gurram Kishan, Karnataka, IN;
Salkod Parameshwar Mallika, Karnataka, IN;
Bhaskar Veldurthy, Karnataka, IN;
Venkata Rama Narayanan Ganapathy Bhotla, Karnataka, IN;
Shivappa Basappa Halligudi, Pune, IN;
Gurram Kishan, Karnataka, IN;
Salkod Parameshwar Mallika, Karnataka, IN;
Bhaskar Veldurthy, Karnataka, IN;
Abstract
A method for producing a phenolphthalein compound comprises: reacting a phenolic compound of the formula: wherein Ris a hydrogen or a C-Chydrocarbyl group, with a phthalic anhydride compound of the formula: wherein Ris a hydrogen, a C-Chydrocarbyl group, or a halogen, in the presence of a heterogeneous catalyst and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each Ris independently a hydrogen or a C-Chydrocarbyl group; and Ris a hydrogen, a C-Chydrocarbyl group, or a halogen; wherein the heterogeneous catalyst comprises, on a porous support, a calcination product of a heteropolyacid composition.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile