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Official data from INPI

APERFEICOAMENTO EM PROCESSO PARA A FORMACAO DE UMA CAMADA ANTICORROSIVA DE OXIDO SOBRE OS ACOS

ConcedidaInvention Patent

Application data

Number

PI7600567

Type

Invention Patent

Filing

01/30/1975

Publication

-

Progress at the INPI

  1. Filing01/30/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant12/29/81
  6. Expired07/27/93

The letters patent expired on 07/27/1993: 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: 12/29/1981. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

URANIT GMBH

Inventors

C. E. (pessoa física)

K. H. (pessoa física)

P. M. (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

07/27/1993

RPI 1182

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