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:
May. 06, 2008
Filed:
Oct. 31, 2003
Shivkumar Mahadevan, Orange Park, FL (US);
Frank Molock, Orange Park, FL (US);
Robert S. Ward, Lafayette, CA (US);
Yuan Tian, Alameda, CA (US);
Shanger Wang, Fairfield, CA (US);
James M. Serpilio, Jr., Union City, CA (US);
Shivkumar Mahadevan, Orange Park, FL (US);
Frank Molock, Orange Park, FL (US);
Robert S. Ward, Lafayette, CA (US);
Yuan Tian, Alameda, CA (US);
Shanger Wang, Fairfield, CA (US);
James M. Serpilio, Jr., Union City, CA (US);
Johnson & Johnson Vision Care, Inc., Jacksonville, FL (US);
Abstract
The present invention relates to a process for the purification of silicone containing compounds via supercritical fluid extraction. Specifically, the present invention relates to a process comprising the steps of contacting at least one silicone containing compound with a supercritical fluid having a density of between about 0.2 and about 0.8 g/ml, decreasing said density so that two phases are formed a first phase comprising said at least one silicone containing compound and a second phase comprising at least one impurity and separating said second phase from said first phase.