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:
Dec. 19, 2006
Filed:
Jan. 10, 2003
Tsuyoshi Ishikawa, Tokyo, JP;
Masanori Nakasu, Tokyo, JP;
Takatoshi Kudou, Tochigi, JP;
Yoshiyuki Ogawara, Tochigi, JP;
Tsutomu Takahashi, Tochigi, JP;
Katsumi Kawamura, Tokyo, JP;
Tsuyoshi Ishikawa, Tokyo, JP;
Masanori Nakasu, Tokyo, JP;
Takatoshi Kudou, Tochigi, JP;
Yoshiyuki Ogawara, Tochigi, JP;
Tsutomu Takahashi, Tochigi, JP;
Katsumi Kawamura, Tokyo, JP;
PENTAX Corporation, Tokyo, JP;
Abstract
A method of manufacturing a powder, by which it is possible to adjust the strength of the obtained powder is provided. The manufacturing method of a powder involves a step of preparing a slurry containing agglomerated particles of a synthetic material which is produced by reacting a first material and a second material under agitation, and a step of drying the slurry to obtain a powder of the synthetic material. The method has a feature that the particle size of the agglomerated particles is adjusted by, in the step of preparing a slurry, controlling agitation power for agitating the slurry. In the step of preparing a slurry, it is preferable that the slurry is initially agitated at a first agitation power, and at the time when the viscosity of the slurry approaches its maximum value, or at the time when the pH value of the slurry reaches the vicinity of the isoelectric point of the synthetic material, the agitation power is lowered from the first agitation power to a second agitation power. Further, it is preferable that before or after the completion of the reaction of the first material and the second material, the agitation power is increased from the second agitation power to a third agitation power.