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USPatent applicationPatented

Crystalline oxybutynin and process for preparing the same

Granted 20 Aug 2013 · 3 office actions

Current assignee: Viatris Inc. · originally Matrix Laboratories

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Inventors: Madhuresh Sethi, Sanjay Mahajan, Om Dutt Tyagi, Purna Chandra Ray · Examiner: Sudhakar Katakam · AU 1621 · TC 1600

Application· this page
12/866,002
filed 4 Feb 2009
Publication
US 20110087042 A1
published 14 Apr 2011
Patent
US 8,513,455
granted 20 Aug 2013
Patented
Status
granted 20 Aug 2013
1,658
Days in prosecution
filing to grant
22
Claims as granted
4 independent
62
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transactions
2029
20-year term
term adjustment not held
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Abstract

The present invention relates to a crystalline oxybutynin base and process for preparing the same. Further, this invention discloses a process for preparing an acid addition salt of oxybutynin employing the crystalline oxybutynin base.

Claims as granted

22 claims

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Classifications

5 codes
IPC · International Patent Classification
Section C — Chemistry; metallurgy
  • C07C69/76
USPC · US Patent Classification
560/101514/617514/534560/58

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Pendency
4.5 y
1,658 days filing → grant
Office actions
1
after a restriction
Responses
2
1 RCE
Examiner
Sudhakar Katakam
art unit 1621 · TC 1600
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Citations: 1 back · 0 forward

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Documents

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Chain of title

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