US Patent No: 6,894,184
Number of patents in Portfolio can not be more than 2000
Process for preparing 2-cyano-3-hydroxy-N-(phenyl)but-2-enamides
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May 17, 2005
Issued date -
Mar 17, 2004
filing date -
10/802,583
serial no -
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Abstract
A process is described for producing 2-cyano-3-hydroxy-N-(phenyl)but-2-enamide, in which a phenyl-substituted 2-cyano-N-(phenyl)acetamide is reacted in the presence of a base, acetic anhydride and at least one solvent, and the resultant 2-cyano-3-hydroxy-N-(phenyl-derivative)but-2-enamide is crystallized by acidification.
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,519,042 Method of treating hyperproliferative vascular disease | 37 | 1994 | |
| 5,679,709 Medicaments to combat autoimmune diseases | 5 | 1995 | |
| 6,121,316 2-cyano-3,5-dihydroxyhex-2-enecarboxamide derivatives | 1 | 1997 | |
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| 5,700,822 Treatment of platelet derived growth factor related disorders such as cancers | 20 | 1995 | |
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Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Nov 17, 2016 |
| Fee | Large entity fee | small entity fee | micro entity fee |
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| 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 |
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