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. 06, 1990
Filed:
Aug. 24, 1988
Eva G Johansson, Goteborg, SE;
Jan M Utas-Sjoberg, Molndal, SE;
Astra Meditec AB, Molndal, SE;
Abstract
A method of forming an improved hydrophilic coating by applying on a non-reactive hydrophilic polymer surface layer an osmolality-increasing compound to produce a more stable hydrophilic surface and to produce a more slippery surface in wet condition. The polymer surface layer is treated with a solution having above 2% (weight/volume) of an osmolality increasing compound and then the solvent of the solution is evaporated. Osmolality increasing compounds are nontoxic organic or unorganic salts other than trihalogenids, mono- or di- saccharides or sugar alcohols. Preferred compounds are glucose, sorbitol, sodium chloride, sodium citrate, sodium bensoate, calcium chloride, potassium chloride, potassium iodide, potassium nitrate. The solution of the osmolality increasing compound contains preferably a polymer. Medical articles treated with the solution of osmolality increasing compounds according to the method above also relate to the invention.