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:
Nov. 30, 1999
Filed:
Feb. 27, 1998
Applicant:
Inventors:
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08G / ;
U.S. Cl.
CPC ...
526 59 ; 526 60 ; 526 61 ; 526 64 ;
Abstract
In a polymerization apparatus in which the power of a motor is transmitted to a stirrer via oil-lubricated transmission box and speed reduction gear, the temperature of the lubricating oil in the transmission box and speed reduction gear is maintained constant by means of a heat exchanger, the torque between the motor and the transmission box or the speed reduction gear is measured with a torque meter, the viscosity of a reaction mixture is calculated from the measured torque and the number of rotation of the stirrer, and the stirrer is kept revolving until the calculated viscosity of the reaction mixture reaches a prescribed value.