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(12) Patent: | (11) CA 1308772 |
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(21) Application Number: | 1308772 |
(54) English Title: | FLUORESCENT LIGHTS |
(54) French Title: | LUMINAIRES FLUORESCENTS |
Status: | Expired and beyond the Period of Reversal |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : | |
(74) Agent: | SMART & BIGGAR LP |
(74) Associate agent: | |
(45) Issued: | 1992-10-13 |
(22) Filed Date: | 1987-09-17 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | None |
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A B S T R A C T
A fluorescent lamp system in which an inductor
(12) is connected in series with the cathodes (4, 6) of a
gas discharge tube (2). Separate connections (14, 16) are
tapped from the inductor (12) and also coupled to the
cathodes of the tube. One connection includes a capacitor
(18). Upon connection of an AC electrical supply a voltage
builds up and discharges from the capacitor (18) at one
cathode (4) as a surge voltage builds up at the other
cathode (6). The resulting peak voltage at the cathodes is
sufficient to immediately strike an arc in the tube (2).
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
2024-08-01:As part of the Next Generation Patents (NGP) transition, the Canadian Patents Database (CPD) now contains a more detailed Event History, which replicates the Event Log of our new back-office solution.
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Description | Date |
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Time Limit for Reversal Expired | 1999-10-13 |
Letter Sent | 1998-10-13 |
Grant by Issuance | 1992-10-13 |
There is no abandonment history.
Fee Type | Anniversary Year | Due Date | Paid Date |
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MF (category 1, 5th anniv.) - small | 1997-10-14 | 1997-10-08 | |
Reversal of deemed expiry | 1997-10-14 | 1997-10-08 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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TO YUEN |
BONG CHAN |
CHIU YEUNG POON |
CHI MAN LUI |
Past Owners on Record |
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None |