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:
Feb. 20, 2001
Filed:
Aug. 05, 1999
Applicant:
Inventors:
Sumio Soya, Kanagawa, JP;
Makoto Saito, Kanagawa, JP;
Tohru Yamamoto, Kanagawa, JP;
Yasuhito Wakabayashi, Kanagawa, JP;
Assignee:
Showa Denko Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B 2/404 ; C04B 2/412 ;
U.S. Cl.
CPC ...
C04B 2/404 ; C04B 2/412 ;
Abstract
An additive for an admixture of a cement composition, especially, a retarder of a cement composition, capable of exhibiting excellent retardation effect with a smaller addition amount and easily controlling the retardation time by adjusting the addition amount. An admixture of a cement composition, comprising a cement and at least one iminodiacetic acid or salt thereof represented by formula (I):