Interference No. 103,995 Paper 29
Morel v. Sekhar Page 24
the surface, leaving a non-bonded layer between the surface and the
substrate. The layer absorbs differences in the coefficient of expansion
when the component is subjected to thermal shocks. Typical pretreatment
o o
consists in raising the temperature at 300 C./hour up to 1000 C., holding at
o
1000 C. for 15 minutes and cooling in atmosphere. After cooling, the
component is available for its intended use. [The ‘084 patent, c. 2, ll. 34-52.]
First, Morel claims 2 and 5 recite coating compositions, not methods of coating or
coated substrates per se.
Second, insofar as both Sekhar ‘513 and Morel patent ‘084 describe methods of
coating a material by applying a silicon-based slurry coating composition to the material
and heating in an oxidizing atmosphere, it appears that both methods would yield
substantially similar coatings under substantially similar reaction conditions. Indeed,
“vitrify” means “to sinter or melt to a glassy mass” (see n.2).
Furthermore, Morel’s reliance on column 11, line 23 of Sekhar ‘513 appears to be
nothing more than attorney argument, focusing on what is claimed rather than disclosed in
Sekhar ‘513 (SDEx 3).
47. Column 11, line 23 of Sekhar ‘513 is the following emphasized portion of
Sekhar ‘513 claim 1 (SDEx 3, c. 11):
1. A body of carbonaceous material for use in corrosive
environments such as oxidising media or gaseous or liquid corrosive agents
at elevated temperatures, coated with a non-glassy protective surface
coating which improves the resistance of the body to oxidation or corrosion
and which may also enhance the body’s electrical conductivity and/or its
electrochemical activity, the protective coating being applied from a colloidal
slurry containing particulate reactant or non-reactant, said slurry forming
said non-glassy protective coating by reaction sintering and/or sintering
without reaction when the body is heated to a sufficiently elevated
temperature.
It is possible for a patent specification to describe more than one patentable
Page: Previous 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Next
Last modified: November 3, 2007