Official data from INPI

PROCESSO DE POLIMERIZACAO DE DIENOS CONJUGADOS

Em AnáliseInvention Patent

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Application data

Number

PI7604118

Type

Invention Patent

Filing

06/24/1975

Publication

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Progress at the INPI

Filing06/24/75
Publication
Examination
Allowance
Grant12/29/81
Expired08/03/93

The letters patent expired on 08/03/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 11/16/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MICHELIN & CIE

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Inventors

Z. Y. (pessoa física)

Technical data

IPC Classification

C08F 36/04 C08F 4/52

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

11/16/1988

RPI 943

22.0

06/29/1982

RPI 610

16.3

03/30/1982

RPI 597

Concessão da patente

#16.1

12/29/1981

RPI 584

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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