Nova Patents
IS7128A

Purification and crystalline forms of zaleplon

Abstract

A purification process that is capable of separating zaleplon and a regioisomer of zaleplon that tends to form as a byproduct in the chemical synthesis of zaleplon, resulting in essentially pure zaleplon, is disclosed. In addition, novel crystal forms of zaleplon are accessible with the process.

Term

Term ended

Projected expiry passed 28 January 2024, 2.7 years ago.

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309 members in 21 offices

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Priority claims16

Priority claims
DocumentOfficeKindDate
30939101United States of AmericaP
30939101United States of AmericaP
31790701United States of AmericaP
31790701United States of AmericaP
17067302United States of AmericaA
17067302United States of AmericaA
38819902United States of AmericaP
38819902United States of AmericaP
0224553United States of AmericaW
0224553United States of AmericaW
PCTUS0224553–––
US20010309391P–––
US20010317907P–––
US20020170673–––
US20020388199P–––
WO2002US24553–––

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CA2453751A1CanadaA1
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US2003040522A1United States of AmericaA1
WO02100828A3World Intellectual Property Organization (WIPO)A3
US2003130291A1United States of AmericaA1
WO03011228A3World Intellectual Property Organization (WIPO)A3
IS7069AIcelandA
NO20035538D0NorwayD0
KR20040007683ARepublic of KoreaA
IS7128AThis recordIcelandA
NO20040887LNorwayL
KR20040019085ARepublic of KoreaA
EP1406871A2European Patent Office (EPO)A2
IL159281D0IsraelD0
MXPA03011485AMexicoA
IL160076D0IsraelD0
MXPA04001035AMexicoA
EP1430054A2European Patent Office (EPO)A2
CN1537113AChinaA
HRP20040016A2CroatiaA2
CZ20033544A3CzechiaA3
CZ200471A3CzechiaA3
TR200402588T3TürkiyeT3
SK16232003A3SlovakiaA3
SK472004A3SlovakiaA3
ZA200309677BSouth AfricaB
HRP20040180A2CroatiaA2
EP1406871A4European Patent Office (EPO)A4
US6852858B2United States of AmericaB2
DE02778962T1GermanyT1
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HU0402253A2HungaryA2
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JP2005507858AJapanA
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US6884888B2United States of AmericaB2
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PL372942A1PolandA1
JP2005523874AJapanA
US2005187225A1United States of AmericaA1
PL374176A1PolandA1
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