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. 23, 1993
Filed:
Nov. 21, 1990
Takashi Nanmori, Neyagawa, JP;
Ryu Shinke, Hyogo, JP;
Showa Denka K.K., Tokyo, JP;
Abstract
A thermostable amylase having the following properties: (1) Action: acting on raw starch to produce mainly maltose and matotriose; (2) Optimum pH: about 6.0; (3) Stable pH: after incubation at a pH of 5 to 8 for one hour at 22.degree. C., the residual activity thereof is at least 95%; (4) Optimum temperature: 70.degree. C.; (5) Thermostability: the enzyme is not substantially inactivated by incubation at 60.degree. C. or 70.degree. C. for 15 minutes; and after incubation at 70.degree. C. for one hour, the residual activity thereof is at least 90%; (6) Molecular weight: 52,000.+-.5,000 as determined by gel filtration; a process for production of the amylase using Bacillus stearothermophilus; and a process for production of maltooligosaccharide comprising mainly maltose and maltotriose, comprising the steps of treating raw starch with a thermostable amylase which acts on raw starch, at a temperature lower than a temperature at which the raw starch is gelatinized to hydrolyze the starch and thereby form maltooligosaccharides comprising mainly maltose and maltotriose; and recovering the maltooligosaccharides.