US Patent No: 6,613,301
Number of patents in Portfolio can not be more than 2000
Method for producing nanometer-sized ultrafine titanium dioxide
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Sep 2, 2003
Issued date -
Apr 5, 2001
filing date -
09/828,282
serial no -
Expired
status
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Abstract
A method for producing nano-sized titanium dioxide (TiO.sub.2) ultrafine powder from titanium tetrachloride (TiCl.sub.4) in the vapor phase by the gas phase oxidation reaction using flames, in which the method comprises: simultaneously introducing titanium tetrachloride (TiCl.sub.4), vapor, argon, oxygen, hydrogen and air into a five-piped flame reactor to form a flame having a temperature of greater than 1,000.degree. C.; and producing nano-sized titanium dioxide ultrafine powder having an average particle size of less than 50 nm.
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,922,120 Process for producing coated TiO.sub.2 pigment using cooxidation to provide hydrous oxide coatings | 22 | 1997 | |
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| 5,985,020 Plate-like titanium dioxide reduction pigment | 8 | 1998 | |
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 | Mar 2, 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 |