Appeal No. 1997-1231
Application No. 08/308,985
DECISION ON APPEAL
This is an appeal from the final rejection of claims 1 to 1
11.
The disclosed invention relates to a ballast for a
gas-discharge lamp, particularly for use in motor vehicles.
The ballast of the present invention comprises a switched
DC/DC converter means comprising a switched DC/DC converter of
the “fly-back” type and a second switched DC/DC converter of
the “feed-forward” type. This structure of the two specific
DC/DC converters is smaller in dimension than previous devices
while being able to start the lamp and a subsequent low
voltage with high electrical power to support the passage of a
large current through the lamp during the warming-up and
steady-state operation of the lamp. The ballast contains an
1The first final rejection was mailed as paper no. 6.
There was an amendment (paper no. 11) after that final
rejection, which was approved for entry (paper no. 12). As a
result of the amendment, claim 13 was allowed. Claim 12 had
already been indicated to contain allowable matter. Another
final rejection was mailed as paper no. 13. This final
rejection is the same as the first final rejection, except
that claim 10 had been inadvertently omitted from the first
final rejection. The grounds of rejection in both the final
rejections are the same.
2
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