Nova Patents
RO82376B

Process for preparing 9-hydroxy-amino-dibenzopyran derivatives

Abstract

The invention relates to a process for the preparation of 9-hydroxyaminodibenzopyran derivatives of general formula I on page 1 of the description, wherein R 1 represents a hydrogen atom, R 2 represents an alkyl radical with 5-10 carbon atoms, R 3 represents a hydrogen atom or a methyl radical by that as derivatives of general formula II, wherein R 1, R 2 and R 3 have the mentioned meanings.

Term

Term ended

Expired 13 February 1994, 32.6 years ago.

  1. Priority
  2. Filed
  3. Granted
  4. Expired
  5. Today

68 members in 29 offices

This recordMember, by publication datePriority claim19 more offices are in the list below

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Priority claims
DocumentOfficeKindDate
87884478United States of AmericaA

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US1979952AUnited States of AmericaA
US2596527AUnited States of AmericaA
PT69202APortugalA
US4152450AUnited States of AmericaA
IL56582A0IsraelA0
LU80922A1LuxembourgA1
BE873981ABelgiumA
IE790304LIrelandL
FI790503AFinlandA
FI790503A7FinlandA7
AU4398379AAustraliaA
GB2014571AUnited KingdomA
EP0003883A1European Patent Office (EPO)A1
FR2417510A1FranceA1
DK68179ADenmarkA
JPS54122278AJapanA
PL213479A1PolandA1
US4195025AUnited States of AmericaA
ES477832A1SpainA1
DD142190A5German Democratic Republic (until 1990)A5
ES485621A1SpainA1
ES485619A0SpainA0
ES485620A0SpainA0
ES8502105A1SpainA1
ES8502106A1SpainA1
FR2417510B1FranceB1
NZ189591ANew ZealandA
ZA79726BSouth AfricaB
SU812177A3Soviet Union (until 1991)A3
ATA123979AAustriaA
ATA588280AAustriaA
ATA588480AAustriaA
CS207769B2Czechoslovakia (until 1993)B2
CS207770B2Czechoslovakia (until 1993)B2
CS207771B2Czechoslovakia (until 1993)B2
CS207772B2Czechoslovakia (until 1993)B2
PH14622APhilippinesA
ATA588380AAustriaA
AU518718B2AustraliaB2
CA1111425ACanadaA
PL118576B1PolandB1
AR224359A1ArgentinaA1
RO76886ARomaniaA
AT366039BAustriaB
AT366040BAustriaB
AT366041BAustriaB
PL120645B1PolandB1
PL120658B1PolandB1
PL120661B1PolandB1
PL121009B1PolandB1
AR225939A1ArgentinaA1
AT367048BAustriaB
EP0003883B1European Patent Office (EPO)B1
DE2963797D1GermanyD1
GB2014571BUnited KingdomB
HU180729BHungaryB
GR71465BGreeceB
RO82369BRomaniaB
RO82370BRomaniaB
RO82376BThis recordRomaniaB
RO82369ARomaniaA
RO82370ARomaniaA
RO82375ARomaniaA
RO82376ARomaniaA
CH638800A5SwitzerlandA5
IE47999B1IrelandB1
US4512699AUnited States of AmericaA
US4650385AUnited States of AmericaA