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:
Jul. 14, 2015
Filed:
Dec. 22, 2010
Karikath Sukumar Varma, Southport, GB;
Benjamin Michael Stiefvater-thomas, Chorley, GB;
Karikath Sukumar Varma, Southport, GB;
Benjamin Michael Stiefvater-Thomas, Chorley, GB;
PILKINGTON GROUP LIMITED, St. Helens, GB;
Abstract
An additive for alkali metal silicate solutions, comprising a quaternary ammonium compound having the general formula () RRRRNOH, wherein R, R, Rand Rwhich may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups, hydroxy-substituted alkaryl groups comprising from 1 to 12 carbon atoms, or groups having the general formula —[CH]n-NRRRwherein n is an integer having a value of from 1 to 12, the group —[CH]n may be hydroxy-substituted, and R, Rand Rwhich may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups or hydroxy-substituted alkaryl groups comprising from 1 to 12 carbon atoms; with the proviso that at least one of the groups R, R, R, R, R, Rand Rrepresents a hydroxy-substituted alkyl group or a hydroxy-substituted alkaryl group comprising at least 2 carbon atoms wherein the hydroxy substituent is not located on a carbon atom which is bonded to a nitrogen atom.