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:
Mar. 03, 2009
Filed:
Jul. 18, 2005
Applicant:
Johannes Schäfter, Lörrach, DE;
Inventor:
Johannes Schäfter, Lörrach, DE;
Assignee:
Ciba Specialty Chemicals Corp., Tarrytown, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 69/76 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a process for preparing solid particles comprising a phenolic antioxidant in essentially crystalline form and to the process step of further processing the phenolic antioxidants. Solid particles are prepared from a melt of the phenolic antioxidants are added to a dispersion comprising the solid particles of the compound (I) in a mixture of an organic water-miscible solvent and water and the crystals obtained from the dispersion are separated.