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. 23, 2010
Filed:
Oct. 20, 2004
Yongxing Qiu, Duluth, GA (US);
Fiona Patricia Carney, Atlanta, GA (US);
Nichola Kotov, Stillwater, OK (US);
John Martin Lally, Lilburn, GA (US);
Carol Ann Morris, Duluth, GA (US);
Yongxing Qiu, Duluth, GA (US);
Fiona Patricia Carney, Atlanta, GA (US);
Nichola Kotov, Stillwater, OK (US);
John Martin Lally, Lilburn, GA (US);
Carol Ann Morris, Duluth, GA (US);
Novartis AG, Basel, CH;
Abstract
The present invention provides a method for forming on a medical device, preferably an ophthalmic lens, more preferably a contact lens, a diffusion-controllable coating capable of controlling the out-diffusion or release of guest materials from the medical device. The method of the invention comprises: (1) applying one layer of clay and optionally one or more layers of polyionic materials onto the medical device; or (2) applying alternatively a layer of a first polyionic material and a layer of a second polyionic material having charges opposite of the charges of the first polyionic material onto the medical device and releasing the coated medical device into a releasing medium having a composition capable of imparting a desired permeability to the diffusion-controllable coating on the medical device.