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:
Jun. 24, 2003
Filed:
Nov. 22, 2000
Michael Yao-Chi Chiang, Flemington, NJ (US);
Larry Kent Hall, Northampton, PA (US);
Lonza Inc., Fair Lawn, NJ (US);
Abstract
The present inventors have discovered that electrolytes, such as the tetrasodium salt of ethylenediaminetetraacetic acid (EDTA), reduce the ocular irritation and increase the disinfecting and sanitizing efficacy of compositions containing quaternary ammonium compounds and/or amines. As a result, concentrated solutions containing quaternary ammonium compounds and/or amines of the present invention have low, if any, ocular irritation. Furthermore, use dilutions of the concentrated solutions of the present invention include ingredients which are approved by the U.S. EPA for use on indirect food contact surfaces, unlike disinfecting and sanitizing compositions containing imidazoline compounds. Additionally, the use dilutions exhibit superior efficacy against gram negative and positive bacteria compared to similar compositions which do not contain the electrolyte and remain effective in hard water. The present invention is a concentrate, such as a sanitizing and disinfecting concentrate, comprising from about 0.5 to about 4.0% by weight of a quaternary ammonium compound, an amine, or a combination thereof and from about 2.0 to about 15.0% by weight of electrolyte, based upon 100% total weight of concentrate. The concentrate is generally substantially free of imidazoline compounds. Another embodiment is an ophthalmic solution comprising a quaternary ammonium compound, an amine, or a combination thereof, at least one electrolyte, and, optionally, a biologically active agent.