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. 13, 1984
Filed:
May. 17, 1982
Virgil J Barczak, Oklahoma City, OK (US);
Haywood A Perkins, Mobile, AL (US);
O L Daigle, Oklahoma City, OK (US);
Other;
Abstract
A process for producing an iron oxide weighting material from an iron chloride solution. The iron chloride solution is introduced into an elevated temperature reactor as an atomized mist. The moisture is evaporated from the mist to form iron chloride solids which then react with the steam produced during the evaporation to form particulate iron oxides and hydrogen chloride gas. The iron oxides then are compacted and introduced into a calcination zone maintained at a temperature in the range of from about 400.degree. C. to about 1300.degree. C. The compacted iron oxide is calcined to reduce the surface area of the particles. The calcined iron oxide then is ground to a predetermined particle size.