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:
Mar. 24, 1992
Filed:
Jan. 05, 1990
Applicant:
Inventors:
Rae A Royle, Houston, TX (US);
David G Nolte, Houston, TX (US);
Assignee:
Texaco Inc., White Plains, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ; G01N / ;
U.S. Cl.
CPC ...
436 31 ; 436174 ; 436177 ;
Abstract
The invention is a method for the isolation of palynological materials from a rock sample in a pressurized reaction cell, which permits reaction at pressures greater than two atmospheres and provides for the removal of all liquids from the cell without significant loss of sample solids, the method employing multiple steps of addition and removal of concentrated and dilute hydrochloric acid, concentrated hydrofluoric acid, concentrated ammonium hydroxide, concentrated nitric acid and deionized water, followed by centrifugation and zinc bromide separation steps.