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:
Jun. 04, 1985
Filed:
Jan. 03, 1984
Lars E Ehrnford, Malmo, SE;
Austenal International, Inc., Chicago, IL (US);
Abstract
Condensing instruments are used for packing and condensing in connection with placement of dental composite resin restorative materials. These instruments are manufactured in metal or plastic material. Some composite resins however, contain hard particles and require a relatively large condensing pressure which causes abrasion of superficial fragments of prior art metal instruments. These fragments are confined in the restorative material and causes discoloration, often after oxidation. Plastic instruments quickly loose their surface finish, which may render it impossible to perform an adequate condensation. In order to provide an instrument which does not cause discoloration and which guarantees a durable function, at least one functional member (4 and/or 5) of the instrument consists of a metal alloy having a coating (6 and/or 7) of ceramic material which provides the working surface (8 and/or 9) of the functional member.