RICHARD L DOUCETTE
Engineering in Beverly Farms, MA
License number
Massachusetts 25797
Issued Date
Dec 17, 1971
Expiration Date
Jun 30, 2006
Type
Chemical Engineer
Address
Address
Beverly Farms, MA 01915
Professional information
Aluminum Oxide Reflector Layer For Fluorescent Lamps
US Patent:
4924141, May 8, 1990
Filed:
Nov 12, 1986
Appl. No.:
6/929691
Inventors:
Fred R. Taubner - Danvers MA
Richard L. Doucette - Beverly MA
Gerald B. Fredrickson - Danvers MA
Richard L. Doucette - Beverly MA
Gerald B. Fredrickson - Danvers MA
Assignee:
GTE Products Corporation - Danvers MA
International Classification:
H01J 6135
US Classification:
313488
Abstract:
An improved fluorescent lamp is disclosed. The lamp of the present invention includes an envelope containing an ionizable medium including mercury and having electrodes located within the envelope; an aluminum oxide reflector layer on the inner surface of the envelope, and a phosphor layer disposed on the reflector layer. The aluminum oxide reflector layer comprises particles of high purity aluminum oxide having an average particle size greater than 0. 5 micrometer and less than or equal to about 1 micrometer and having a surface area of about 4 to 6 meter. sup. 2 /gram. The aluminum oxide reflector layer preferably includes at least 95 weight percent alpha-alumina. Preferred coating weights for the reflector layer are from about 8. 8 to about 11. 1 milligram/square centimeter.