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:
Aug. 03, 1993
Filed:
Jul. 23, 1992
Applicant:
Inventor:
Thomas S Dewitz, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10J / ; C10J / ;
U.S. Cl.
CPC ...
48 77 ; 48 8 / ;
Abstract
An apparatus for gasifying coal is disclosed. Lock hoppers which are in fluid communication with each other are provided. A pressure recovery device is arranged to recover energy while depressurizing one hopper and pressurizing another.