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:
Aug. 17, 1976
Filed:
Mar. 13, 1974
Donald W Renn, Glen Cove, ME (US);
Marine Colloids, Inc., Rockland, ME (US);
Abstract
Device for applying a measured quantity of water-soluble or water-dispersible reagent to a water-containing solid medium for use in molecular diffusion or affinity separation procedures is provided in the form of a film consisting essentially of a film-forming solid organic polymeric binder which is soluble in water to the extent of at least 1% by weight at 20.degree.C. and dispersed in said binder a measured quantity of said reagent, said film being of a size and shape adapted to be placed in contact with said medium to permit said reagent and binder to diffuse completely into said medium. The device is used by placing it in face-to-face contact with a water-containing solid medium.