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:
Jan. 03, 2017
Filed:
Mar. 01, 2013
Guillaume Fiey, Lille, FR;
Marilyne Guillemant, Aire sur la Lys, FR;
Jean-michel Roturier, Armentieres, FR;
Nicolas Jacquel, Lambersart, FR;
Guillaume Fiey, Lille, FR;
Marilyne Guillemant, Aire sur la Lys, FR;
Jean-Michel Roturier, Armentieres, FR;
Nicolas Jacquel, Lambersart, FR;
ROQUETTE FRERES, Lestrem, FR;
Abstract
A method for measuring the thermal stability of succinic acid includes the following steps: 1) preparing a succinic acid crystal powder having less than 1% residual water content; 2) placing 10 g of the crystal powder in an oven at 220° C. for 2 hours; 3) pulverizing and sieving the crystal powder processed in this way, such that the particle size distribution thereof is between 0 and 10%, and preferably between 4 and 6% for particles larger than 500 μm in size, between 20 and 40%, and preferably between 25 and 35% for particles between 200 and 500 μm in size, between 50 and 75% and preferably between 55 and 70% for particles smaller than 200 μm in size; and 4) measuring the color, in a spectrocolorimeter, of the pulverized and sieved powder and determining the average value of the yellow (index 'b').