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:
Feb. 20, 2007
Filed:
Jun. 17, 2005
Takanobu Tsudera, Joetsu, JP;
Shuji Tanaka, Joetsu, JP;
Daisuke Iwai, Joetsu, JP;
Hiromi Nishiwaki, Joetsu, JP;
Takayuki Honma, Joetsu, JP;
Takanobu Tsudera, Joetsu, JP;
Shuji Tanaka, Joetsu, JP;
Daisuke Iwai, Joetsu, JP;
Hiromi Nishiwaki, Joetsu, JP;
Takayuki Honma, Joetsu, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
High-purity trimethylaluminum has the following impurity contents: organosilicon components≦0.5 ppm, chlorine components≦20 ppm, hydrocarbon components≦1,000 ppm, Ca≦0.05 ppm, Fe≦0.05 ppm, Mg≦0.05 ppm, Na≦0.05 ppm, Si (Si components other than the organosilicon components)≦0.07 ppm, Zn≦0.05 ppm, and S≦0.05 ppm. The high-purity trimethylaluminum can be obtained by removing impurities from crude trimethylaluminum through distillation and evaporation.