Appeal No. 1999-0434
Application No. 08/664,257
BACKGROUND
The invention is directed to data communication cables having flame-resistant and
smoke-suppressive properties such that the cables may be placed in buildings without the
requirement of being within metal conduits. Claim 30 is reproduced below.1
30. A plenum rated data communication cable for transmitting high-frequency
signals, comprising:
at least one pair of conductors;
an insulation layer surrounding and enclosing each conductor, said insulation
layer comprising a fluoropolymer having a signal dissipation factor less than about
-4
3 x 10 and a dielectric constant less than about 2.1 at high frequencies;
a first jacket layer surrounding and enclosing the insulated conductors, said
first jacket layer comprising a material having flame-resistant and smoke-
suppressive properties;
a metallic shield surrounding said first jacket layer; and
a second jacket layer surrounding and sealing said metallic shield against
said first jacket layer, said second jacket layer comprising a material having flame-
resistant and smoke-suppressive properties.
The examiner relies on the following references:
Mitacek 3,697,670 Oct. 10, 1972
Schwarcz et al. (Schwarcz) 3,945,974 Mar. 23, 1976
Stine et al. (Stine) 4,041,237 Aug. 9, 1977
1We note that appellant filed an amendment after final rejection on December 29, 1997 which
proposed amending the specification and claims 31 and 51. Although the examiner indicated (Advisory
Action mailed January 12, 1998) that the amendment will be entered upon the filing of a Notice of Appeal
and an Appeal Brief, the amendment has not been formally entered. Consistent with the examiner’s
indication and with appellant’s claim appendix attached to the appeal brief, we consider the specification
and claims as amended.
-2-
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Next
Last modified: November 3, 2007