Dirk Lohan
Architects at Michigan Ave, Chicago, IL
License number
Colorado 302790
Issued Date
Apr 16, 1984
Renew Date
Aug 1, 2001
Expiration Date
Jul 31, 2003
Type
Architect
Address
Address
225 N Michigan Ave #800, Chicago, IL 60601
Professional information
Principal At Lohan Anderson
Position:
Principal and Owner at Lohan Anderson
Location:
Greater Chicago Area
Industry:
Architecture & Planning
Work:
Lohan Anderson
- Chicago, IL since Jan 2004
-
Principal and Owner
Lohan Associates
1986 - 2002
-
Principal
Education:
Illinois Institute of Technology 1957 - 1958
Chemically Bonded Phospho-Silicate Ceramics
US Patent:
6518212, Feb 11, 2003
Filed:
Sep 18, 2000
Appl. No.:
09/664490
Inventors:
Arun S. Wagh - Orland Park IL
Seung Y. Jeong - Westmont IL
Dirk Lohan - Chicago IL
Anne Elizabeth - Chicago IL
Seung Y. Jeong - Westmont IL
Dirk Lohan - Chicago IL
Anne Elizabeth - Chicago IL
Assignee:
The University of Chicago - Chicago IL
International Classification:
C04B 35447
US Classification:
501111
Abstract:
A chemically bonded phospho-silicate ceramic formed by chemically reacting a monovalent alkali metal phosphate (or ammonium hydrogen phosphate) and a sparsely soluble oxide, with a sparsely soluble silicate in an aqueous solution. The monovalent alkali metal phosphate (or ammonium hydrogen phosphate) and sparsely soluble oxide are both in powder form and combined in a stochiometric molar ratio range of (0. 5-1. 5):1 to form a binder powder. Similarly, the sparsely soluble silicate is also in powder form and mixed with the binder powder to form a mixture. Water is added to the mixture to form a slurry. The water comprises 50% by weight of the powder mixture in said slurry. The slurry is allowed to harden. The resulting chemically bonded phospho-silicate ceramic exhibits high flexural strength, high compression strength, low porosity and permeability to water, has a definable and bio-compatible chemical composition, and is readily and easily colored to almost any desired shade or hue.