US Patent No: 7,462,743
Number of patents in Portfolio can not be more than 2000
Polymorphs of memantine hydrochloride
Stats
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Dec 9, 2008
Issued date -
Jan 11, 2006
filing date -
11/331,263
serial no -
Expired
status
Importance
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Abstract
A crystalline Form II of memantine hydrochloride, pharmaceutical compositions containing crystalline Form II, and methods of preparing crystalline Forms I and II of memantine hydrochloride are provided.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,614,560 Method of preventing NMDA receptor-mediated neuronal damage | 25 | 1995 | |
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| 5,599,998 Method for the synthesis of adamantane amines | 3 | 1994 | |
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| 5,061,703 Adamantane derivatives in the prevention and treatment of cerebral ischemia | 34 | 1990 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jun 9, 2016 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jun 9, 2020 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
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