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Official data from INPI

PROCESSO PARA TORNAR OLEOFILA UMA SUPERFICIE TENDO PRATA METALICA EM MODELO DE IMAGEM SUBSTRATO TENDO UMA SUPERFICIE QUE TEM AREAS DE IMAGEM E AREAS DE FUNDO HIDROFILAS E SOLUCAO AQUOSA DE SAL ACIDO HOMOGENEAMENTE ESTAVEL

ConcedidaInvention Patent

Application data

Number

PI7500076

Type

Invention Patent

Filing

01/07/1974

Publication

-

Progress at the INPI

  1. Filing01/07/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant12/29/81
  6. 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: 12/29/1981. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MINNESOTA MINING & MFG

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Inventors

B. D. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/29/1981

RPI 584

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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