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:
Jan. 27, 1976
Filed:
Jul. 02, 1973
Yujiro Sugahara, Tokyo, JA;
Yoshibumi Noshi, Tsuruoka, JA;
Hiroyuki Naito, Tsuruoka, JA;
Akira Takahashi, Tsuruoka, JA;
Shoji Shoji, Tsuruoka, JA;
Mizusawa Kagaku Kogyo Kabushiki Kaisha, Osaka, JA;
Abstract
When phosphate rock and sulfuric acid are mixed under such conditions that gypsum dihydrate is stably formed and sulfuric acid is added to the phosphate rock in an amount not exceeding the amount equivalent to a calcium component in the phosphate rock, small masses of the reaction product between the phosphate rock and sulfuric acid can be maintained in the non-disintegrable form throughout extraction of phosphoric acid from said reaction product, and phosphoric acid can be extracted from such reaction product at a high rate in a good yield.