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:
Feb. 14, 2006
Filed:
Dec. 17, 2002
Madhu Ayyagari, Fairport, NY (US);
Mahendra P. Nandu, Rochester, NY (US);
Erik M. Indra, Webster, NY (US);
Alan J. Braun, Livonia, NY (US);
Madhu Ayyagari, Fairport, NY (US);
Mahendra P. Nandu, Rochester, NY (US);
Erik M. Indra, Webster, NY (US);
Alan J. Braun, Livonia, NY (US);
Bausch & Lomb Incorporated, Rochester, NY (US);
Abstract
A method of extracting residual materials from a polymeric, ophthalmic biomedical device, such as a contact lens, by using a mixture comprised of a primary solvent, such as carbon dioxide, and a polar co-solvent, such as isopropanol. By exposing the device to the co-solvent, the device expands. By pulsing or varying the concentration of the polar co-solvent in the mixture, the lens dimensions vary accordingly. When the lens is extracted while retained in a mold, the changes in lens dimensions causes the lens to be released from the mold.