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:
Apr. 06, 1976
Filed:
Dec. 27, 1972
Leonid Fedorovich Vereschagin, Moscow, SU;
Alexandr Yakovlevich Preobrazhensky, Moscow, SU;
Vasily Alexandrovich Stepanov, Moscow, SU;
Valentin Semenovich Voblikov, Moscow, SU;
Other;
Abstract
A workpiece made of a non-diamond carbonaceous material and having dimensions exceeding those of a polycrystalline diamond aggregate by a contraction coefficient value of the non-diamond material during its transformation into a polycrystalline diamond material, is enclosed with a powder-like catalyst having particle dimensions less than the minimum dimensions of the workpiece, subjected to a pressure of at least 80 kb, and heated by a pulse of electric current for a period of 0.1 to 10 seconds sufficient for the formation of said polycrystalline aggregate.