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Official data from INPI

PROCESSO PARA A PREPARACAO DE UMA MISTURA DE DI(AMINO-FENIL)METANO E POLI-AMINAS POLI-METILENO-POLI-FENILICAS OLIGOMERICAS

Em AnáliseInvention Patent

Application data

Number

PI7604755

Type

Invention Patent

Filing

07/24/1975

Publication

-

Progress at the INPI

  1. Filing07/24/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant
  6. Expired07/20/93

The letters patent expired on 07/20/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 09/23/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

UPJOHN CO

See this company's full portfolio

Inventors

F. F. (pessoa física)

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

09/23/1986

RPI 831

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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