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. 02, 2012
Filed:
Jul. 19, 2010
Applicants:
Donald Stevenson, Dover, OH (US);
Ping Lue, Garnet Valley, PA (US);
Jacob M. Lance, Dover, OH (US);
Inventors:
Assignee:
Dover Chemical Corporation, Dover, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 9/576 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention pertains to a process for the preparation of pentaerythritol diphosphites via a one-pot, direct esterification of phosphorus trichloride with pentaerithritol, and either an alkylphenol or an arylalkylphenol which functions both as a reactant and as a solvent, with a phase transfer catalyst such as a quaternary ammonium salt.
Stevenson, Donald. (2012). Phase transfer catalyst for synthesis of pentaerythritol diphosphites (U.S. Patent No. 8278490). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8278490
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile