Appeal No. 95-5093
Application 08/047,132
1. A device for implantation in a human body in contact
with body fluids comprising:
a container having an opening between the exterior and
interior of said container;
an electrical terminal extending from the interior of said
container through the opening in said container to the exterior
of said container where it is subject to contact with body
fluids, said electrical terminal consisting of a material
selected from the group consisting of platinum, platinum-iridium
alloys, titanium, niobium clad with titanium to a thickness in
the range of 50 to 300 microinches, and tantalum clad with
titanium to a thickness in the range of 50 to 300 microinches;
a glass insulator positioned around a portion of said
terminal in sealing engagement with said terminal and said
container, said glass insulator having a chemical composition
consisting essentially of about 20 mole % A1 O , about 20 mole %
2 3
CaO, between about 10 mole % and 15 mole % SiO , between about
2
25 mole % and 40 mole % B O , between about 0 mole % and
2 3
20 mole % MgO between about 0 mole % and 20 mole % BaO and
between about 0 mole % and 10 mole % SrO; and
a sleeve or header attached to said container at said
opening, said sleeve or header positioned between said glass
insulator and said container around a portion of said glass
insulator for receiving same in sealing engagement therewith,
said sleeve or header comprising a metal selected from the group
consisting of titanium and titanium alloys.
The examiner relies upon the following references as
evidence of obviousness:
Kyle 4,421,947 Dec. 20, 1983
Taylor et al. (Taylor) 4,556,613 Dec. 3, 1985
Kraska et al. (Kraska) 4,678,868 Jul. 7, 1987
Randall D. Watkins et al. (Watkins), Chemical Abstracts
108:115770s
Watkins, Chemical Abstracts 108:59384e
-2-
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