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. 11, 1981
Filed:
Aug. 15, 1979
Jeanne Berthet, Velizy Villacoublay, FR;
Gilbert Gaussens, Meudon, FR;
Commissariat a l'Energie Atomique, Paris, FR;
Abstract
Hydrophobic substrate which can release at least one chemical substance, wherein it comprises a hydrophobic polymer matrix in which are homogeneously distributed inclusions of polymerized compounds of a different type to the said hydrophobic polymer and inclusions of the said substance, the polymerized compound inclusions forming in the said matrix a stable and continuous system in contact with the inclusions of the said substance. Process for the preparation of a hydrophobic substrate able to release a chemical substance, wherein it comprises forming inclusions of polymerized compounds in a hydrophobic polymer powder by grafting onto the latter a monomer of a different type to the said hydrophobic polymer, homogeneously mixing the grafted powder obtained in this way with a powder of the said substance and bringing the mixture into the form of a substrate by hot shaping it.