NAME DEAN WITTER

Brand	Owner (click to sort)	Address	Description
DEAN WITTER IN FOCUS	DEAN WITTER REYNOLDS INC.	Two World Trade Center New York NY 10048	THE NAME DEAN WITTER IS FANCIFUL AND DOES NOT IDENTIFY A PARTICULAR LIVING INDIVIDUAL.;NEWSLETTER CONCERNING INVESTMENTS;
DEAN WITTER REYNOLDS INC.	DEAN WITTER REYNOLDS INC.	Two World Trade Center New York NY 10048	The name Dean Witter is now deceased and the name does not identify any particular living individual.;No claim is made to exclusive use of Inc. apart from the mark as shown in the drawing.;Financial Services-Namely, Stock Brokerage Services, Investment Counseling Services and Insurance Brokerage Services;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

The present invention attaches a molecule that contains a hydroxyl group (OH) attached to a carbon chain which is attached to a coordinating atom or atoms, the acidity of which is greater than that of silica (i.e., pKA <10). The condensation is achieved by mixing silica gel, appropriate amount of ligand, and a drop of conc. sulfuric acid in toluene in a flask attached to a Dean-Stark tube. Heating of the mixture is continued until the amount of water, obtained by azeotropic distillation and condensation, reaches a constant value. Toluene is filtered off, and recycled. The supported ligand is dried under reduced pressure to remove residual toluene. The composite (ligand attached to silica) can then be used by batch or column method to remove heavy metal ions from aqueous solution.