Appeal No. 1996-1664
Application No. 08/272,647
an inverter circuit assembly connected with the DC
terminals and operative to provide an inverter output voltage
at a pair of inverter terminals; the inverter output voltage
being a voltage that alternates in an periodic manner between
a first substantially fixed voltage level and a second
substantially fixed voltage level, spending a first time
period at the first voltage level and a second time period at
the second voltage level; the duration of the first period
being substantially different from the duration of the second
period; the inverter output voltage consisting of repeating
cycles; each cycle having a total cycle period; the sum of the
first and second time periods equaling the total cycle period;
the inverter means being further characterized by including a
control circuit operative to control the ratio between the
duration of the first period and that of the second period;
gas discharge lamp having a pair of lamp terminals; and
coupling circuit assembly connected between the inverter
terminals and the lamp terminals.
The reference relied on by the examiner is:
Quazi et al. (Quazi) 4,933,605 June 12,
1990
Claims 32 through 34 stand rejected under 35 U.S.C. § 103
as being unpatentable over Quazi.
BACKGROUND
In a March 31, 1994 decision in the parent application,
the Board stated (Decision, pages 3 and 4) that:
The reference to Quazi discloses a circuit
arrangement that includes an inverter circuit that
produces a high-frequency output for powering a
fluorescent lamp via a coupling circuit. Prior art
Figure 2 shows an inverter output voltage that
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