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:
Oct. 31, 1978
Filed:
Mar. 04, 1977
David H Kaelble, Thousand Oaks, CA (US);
Rockwell International Corporation, El Segundo, CA (US);
Abstract
A sealing material for use in contact with animal tissue such as for sealing a stoma opening. The material is a thermoplastic elastomer made by mixing: (1) at least one part of a high molecular weight, nonvolatile oil with (2) a block copolymer having non-elastomeric thermoplastic end blocks and an elastomeric intermediate block which form separate phases. In one embodiment, the end blocks are polystyrene, the intermediate block is either butadiene or isoprene polymer, and the oil is a hydrocarbon oil. In another embodiment, the end blocks are polyalphamethylstyrene, the intermediate block is polydimethylsiloxane, and the oil is a silicone oil.