BE589784A - Process for the preparation of novel heterocyclic compounds, in particular of pyrazolo (3,4-d) pyrimidines - Google Patents

Process for the preparation of novel heterocyclic compounds, in particular of pyrazolo (3,4-d) pyrimidines

Info

Publication number
BE589784A
BE589784A BE589784A BE589784A BE589784A BE 589784 A BE589784 A BE 589784A BE 589784 A BE589784 A BE 589784A BE 589784 A BE589784 A BE 589784A BE 589784 A BE589784 A BE 589784A
Authority
BE
Belgium
Prior art keywords
pyrazolo
pyrimidines
preparation
heterocyclic compounds
novel heterocyclic
Prior art date
Application number
BE589784A
Other languages
French (fr)
Original Assignee
Ciba Geigy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ciba Geigy filed Critical Ciba Geigy
Publication of BE589784A publication Critical patent/BE589784A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/581—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using a transformer

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)
BE589784A 1959-04-17 1960-04-15 Process for the preparation of novel heterocyclic compounds, in particular of pyrazolo (3,4-d) pyrimidines BE589784A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH589784X 1944-04-04

Publications (1)

Publication Number Publication Date
BE589784A true BE589784A (en) 1960-10-17

Family

ID=4522075

Family Applications (2)

Application Number Title Priority Date Filing Date
BE462769D BE462769A (en) 1944-04-04
BE589784A BE589784A (en) 1959-04-17 1960-04-15 Process for the preparation of novel heterocyclic compounds, in particular of pyrazolo (3,4-d) pyrimidines

Family Applications Before (1)

Application Number Title Priority Date Filing Date
BE462769D BE462769A (en) 1944-04-04

Country Status (3)

Country Link
BE (2) BE589784A (en)
FR (1) FR912557A (en)
GB (1) GB589784A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2576728B1 (en) * 1985-01-25 1988-02-12 Thebault Jack CIRCUIT FOR SEARCHING FOR BALANCING A TRANSMISSION LINE
FI71857C (en) * 1985-06-13 1987-02-09 Nokia Oy Ab Method for adjusting the equalization impedance of a fork transformer.

Also Published As

Publication number Publication date
FR912557A (en) 1946-08-13
BE462769A (en)
GB589784A (en) 1947-06-30

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