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:
Oct. 28, 1986
Filed:
Aug. 02, 1984
Applicant:
Inventors:
Arthur E Lewis, Los Altos, CA (US);
Robert L Braun, Livermore, CA (US);
Richard G Mallon, Livermore, CA (US);
Otis R Walton, Livermore, CA (US);
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10B / ;
U.S. Cl.
CPC ...
202 85 ; 201 28 ; 202 88 ; 202 99 ;
Abstract
A cascading bed retorting process and apparatus in which cold raw crushed shale enters at the middle of a retort column into a mixer stage where it is rapidly mixed with hot recycled shale and thereby heated to pyrolysis temperature. The heated mixture then passes through a pyrolyzer stage where it resides for a sufficient time for complete pyrolysis to occur. The spent shale from the pyrolyzer is recirculated through a burner stage where the residual char is burned to heat the shale which then enters the mixer stage.