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. 07, 1992
Filed:
May. 24, 1989
Kenneth Clare, Vista, CA (US);
Philip E Winston, Jr, San Diego, CA (US);
Harold D Dial, San Diego, CA (US);
Theresa M Ortega, San Diego, CA (US);
Merck & Co., Inc., Rahway, NJ (US);
Abstract
A film forming composition useful as a paper size is described which includes 1-20 parts, preferably 2-15 parts, by weight of a gum selected from the group consisting of xanthan gum, rhamsan gum, welan gum and mixtures thereof; 3-20 parts, preferably 5-17 parts, by weight of a water soluble alginate; and 60-100 parts, preferably 70-90 parts, by weight of starch, polyvinyl alcohol or carboxymethylcellulose, with the gum:alginate ratio being not greater than 1:1, preferably not greater than 1:2. The balance of the composition will primarily be water. Additives such as sodium hexametaphosphate may also be present.