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:
Jan. 23, 1990
Filed:
Jun. 15, 1987
Zahid Amjad, Avon Lake, OH (US);
The B. F. Goodrich Company, Akron, OH (US);
Abstract
This invention pertains to the use of certain acrylic polymers in conjunction with other materials which characterize cleaners of alkaline earth metal scales and metal oxides and hydroxides, particularly citric acid, malic acid, and oxalic acid. Amount of the acrylic polymer is up to 100%, preferably 20 to 80%, based on the weight of a cleaner composition which includes the acrylic polymer. Suitable acrylic polymers are selected from homopolymers of acrylic and methacrylic acids, salts thereof, a copolymers of acrylic and methacrylic acids and salts thereof with 5 to 50% of one or more copolymerizable monomers, the acrylic polymers have molecular weight (M.sub.W) of 500 to 100,000.