Appeal No. 96-1931
Application 07/995,635
constitute all the claims remaining in the application. An
amendment after final rejection was filed on July 28, 1995 and
was entered by the examiner.
The claimed invention pertains to an alumina article
having a surface coated with a coating of oxide of one or more
metals selected from the group consisting of Y, Hf, La, Zr, Dy,
Sc and mixture thereof. The invention also relates to this
article being formed for use as an arc discharge tube for a
sodium vapor arc discharge lamp.
Representative claims 1 and 2 are reproduced as follows:
1. An alumina article having at least one surface wherein
at least a portion of said surface is coated with a transparent
coating of oxide of one or more metals selected from the group
consisting of Y, Hf, La, Zr, Dy, Sc and mixture thereof.
2. A hollow alumina tube suitable for use as an arc tube
for a sodium vapor arc discharge lamp, wherein an interior
surface and an exterior surface of said tube are essentially
continuously coated with a coating of oxide of at least one metal
selected from the group consisting of Y, Hf, La, Zr, Dy, Sc and
mixture thereof.
The examiner relies on the following references:
Koury et al. (Koury) 3,377,498 Apr. 09, 1968
Sulcs et al. (Sulcs) 3,723,784 Mar. 27, 1973
Coaton et al. (Coaton) 4,256,988 Mar. 17, 1981
The examiner=s answer cites the following additional
reference although it is not officially applied in a new ground
of rejection:
2
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