Physician
National Cancer Institute (Nci) 2010 - 2016
Medical Doctor
Perthera 2010 - 2016
Medical Director
Multiple Jul 1997 - Apr 2010
Private Practice
Education:
National Cancer Institute 1993 - 1997
Atlanta Medical Center 1990 - 1993
Medical College of Georgia School of Medicine 1986 - 1990
Doctor of Medicine, Doctorates, Medicine
Skills:
Immunology Clinical Research Transplant Hematology/Oncology Physician
Emory ClinicEmory Psychiatry Residency Training 12 Executive Park Dr NE STE 331, Atlanta, GA 30329 4047275157 (phone), 4047274746 (fax)
Languages:
English Spanish
Description:
Dr. Halverson works in Atlanta, GA and specializes in Psychiatry. Dr. Halverson is affiliated with Emory University Hospital and Grady Memorial Hospital.
Wikipedia References
David D. Halverson
Us Patents
Methods And Compositions For Coating Aluminum Substrates
William V. Block - Apple Valley MN, US David J. Halverson - Greenfield MN, US John Thanh Ngoc Nguyen - Minnetonka MN, US
International Classification:
B05D 1/36 C09K 3/00
US Classification:
4274193, 106 1441, 106 1444
Abstract:
The present invention relates to methods and compositions for coating aluminum substrates. In an embodiment, the invention includes a method of applying a coating on an aluminum substrate including contacting the aluminum substrate with a first solution. The first solution can include a zinc metal salt, a sugar acid or alkali metal salt thereof, and an alkali metal hydroxide. The method can also include contacting the aluminum substrate with a second solution. The second solution can include a molybdate salt, an alkanolamine, and a fluorine acid. Other embodiments are also included herein.
Richard K. Williams - Minnetonka MN David J. Halverson - Long Lake MN James N. Tuttle - Harwich Port MA
Assignee:
Birchwood Laboratories, Inc. - Eden Prairie MN
International Classification:
B05D 138 B05D 300 C23C 2284
US Classification:
427409
Abstract:
The invention is the chemical composition and method for forming a chemical conversion coating on ferrous metal surfaces and subsequent coloring of said conversion coating through the application of a water-soluble dye. The conversion coating has an ordered crystalline structure composed of ferrous oxalate or other ferrous dicarboxylates. The conversion coating can be colored through the application of a water-soluble reactive dye which bonds with Fe (II) within the ferrous dicarboxylate matrix, bound to the dicarboxylate molecules, thereby becoming water insoluble and permanent. When sealed with an appropriate rust preventive top coat, the result is an attractive and protective finish of minimal thickness which can be applied through simple immersion process techniques. Said finish can serve as a final protective finish on a fabricated ferrous metal article and also affords a degree of lubricity for assembly, break-in purposes, or anti-galling protection and serves as an adhesive base for paint.
Methods And Compositions For Coating Aluminum Substrates
- Eden Prairie MN, US David J. Halverson - Greenfield MN, US John T. Nguyen - Minnetonka MN, US
Assignee:
BIRCHWOOD LABORATORIES, INC. - Eden Prairie MN
International Classification:
C09D 1/00
US Classification:
1062871, 10628718
Abstract:
The present invention relates to methods and compositions for coating aluminum substrates. In an embodiment, the invention includes a method of applying a coating on an aluminum substrate including contacting the aluminum substrate with a first solution. The first solution can include a zinc metal salt, a sugar acid or alkali metal salt thereof, and an alkali metal hydroxide. The method can also include contacting the aluminum substrate with a second solution. The second solution can include a molybdate salt, an alkanolamine, and a fluorine acid. Other embodiments are also included herein.
Youtube
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