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US3728340A Expired / Lapsed US ⏱️ 0.0 years remaining

Piperazine derivatives and processes for their manufacture

Assignee: Cassella Farbwerke Mainkur AG
•
Filing: 1971-04-27
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Granted: 1973-04-17
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Expires: 1991-04-27
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Abstract

Abstract The present invention relates to new, pharmacologically valuable piperazine derivatives of the general formula WHEREIN A means an alkyl or hydroxyalkyl radical having from one to four carbon atoms in the alkyl moieties, a benzhydryl or phenyl radical or one of the groups -COOR or R representing alkyl having from one to four carbon atoms and the benzene rings B and/or C may be substituted by halogen AND TO THE PRODUCTION OF SUCH DERIVATIVES BY REACTING A COMPOUND OF THE GENERAL FORMULA WHEREIN D stands for ONa, OK, OH, Cl or Br with a piperazine compound of the general formula WHEREIN A has the meaning given above, or by reacting, at a molar ratio of 2:1, a compound of the general formula WHEREIN D means ONa, OK, OH, Cl or Br with piperazine.

Inventors

  • 👤 K Resag
  • 👤 R Nitz
  • 👤 T Raabe
  • 👤 S Piesch

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 23:55
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/20; C07D295/205; C07C; C07C45/00; C07C45/61; C07C45/64; C07C45/67; C07C45/68; C07D295/04; C07D295/10; C07D295/112; C07D295/116

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 19 words
Piperazine derivatives according to claim 1, characterized in that the benzene ring B and/or C is substituted by chlorine.
Claim 2
Dependent Claim 5 words
Piperazine derivative of the formula
Claim 3
Dependent Claim 5 words
Piperazine derivative of the formula

References Cited (Backward Citations)

US2441069A Cited
US3454565A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-04-16 1976-10-16 1977-04-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-04-16 1980-10-16 1981-04-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-04-16 1984-10-16 1985-04-17 $7700.00 Window Closed / Lapsed

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