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Official data from INPI

COMPOSICAO APERFEICOADA AQUOSA,ACIDA APROPRIADA PARA A LIMPEZA A BAIXAS TEMPERATURAS DE SUPERFICIES DE ALUMINIO E PROCESSO PARA LIMPAR UMA SUPERFICIE DE ALUMINIO

Em AnáliseInvention Patent

Application data

Number

PI7600861

Type

Invention Patent

Filing

02/13/1975

Publication

-

Progress at the INPI

  1. Filing02/13/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant05/25/82
  6. Expired09/21/93

The letters patent expired on 09/21/1993: 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: 07/07/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

OXY METAL INDUSTRIES CORP

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Inventors

F. D. (pessoa física)

K. P. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

07/07/1987

RPI 872

20.4

06/30/1987

RPI 871

Pedido de licença compulsória

#20.1

03/10/1987

RPI 855

Concessão da patente

#16.1

05/25/1982

RPI 605

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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