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:
Sep. 19, 1995
Filed:
Apr. 21, 1994
Applicant:
Inventors:
Herman P Ruyter, Amsterdam, NL;
Anton Hortulanus, Amsterdam, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ; B29C / ;
U.S. Cl.
CPC ...
264322 ; 144380 ; 264345 ; 264347 ; 264348 ;
Abstract
A process for upgrading low-quality wood including a softening stage, wherein one or more sections of low-quality wood are heated, in the presence of an aqueous medium and at a pressure which is at least the equilibrium pressure of the medium at the operating temperature, to a temperature in the range of from about 120.degree. C. to about 160.degree. C. and maintaining the temperature until the temperature difference between the center and the outer parts of the sections is less than about 20.degree. C., a dewatering stage and a curing stage.