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. 11, 1989
Filed:
Aug. 05, 1987
Hisayuki Mizuno, Ube, JP;
Masao Miura, Ube, JP;
Hiroyuki Fukushima, Ube, JP;
Mamoru Miyamoto, Ichihara, JP;
Kyouhei Ohizumi, Ichihara, JP;
Yoshio Nishimura, Ichihara, JP;
Ube Industries, Ltd., Ube, JP;
Abstract
In a method of foreseeing or detecting break-through of a gas in a gas-adsorbing apparatus utilizing a gas-adsorbing material, the improvement in which the break-through is foreseen or detected by detecting a weight of the gas adsorbed by the gas-adsorbing material. When the gas to be detected contains boron trichloride, the break-through can be foreseen or detected by detecting a color change of a detecting agent such as 1,1'-dianthrimide or a combination of caraminic acid, hydrochloric acid and sulfuric acid, the detecting agent being arranged in a lower stream following the gas-adsorbing material and which shows a color change upon contact with boron trichloride.