US Patent No: 6,646,380
Number of patents in Portfolio can not be more than 2000
High-pressure gas discharge lamp
Stats
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Nov 11, 2003
Issued date -
Nov 22, 2000
filing date -
09/718,245
serial no -
In Force
status
Importance
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Abstract
Tungsten electrodes are arranged on two rhenium rods in an electrode chamber in a high-pressure gas discharge lamp, such that the rhenium rods project to inside the electrode chamber.
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First Claim
Related Publications
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International Classification(s)
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- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,404,077 High-pressure discharge lamp | 16 | 1992 | |
| 6,194,832 Metal halide lamp with aluminum gradated stacked plugs | 12 | 1998 | |
| 6,201,349 Electrode with a helical attachment | 2 | 1999 | |
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| 4,806,816 High-pressure discharge lamp | 3 | 1987 | |
| 6,169,365 High-pressure metal halide lamp having three part electrode rods | 13 | 1998 | |
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| 6,534,918 High pressure discharge lamp with tungsten electrode rods having second parts with envelope of rhenium | 1 | 1999 | |
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| 6,368,175 Discharge lamp and method of producing the same | 9 | 1999 | |
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| 6,307,321 High-pressure discharge lamp and lighting apparatus | 11 | 2000 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 11, 2015 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |