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Official data from INPI

PROCESSO PARA A PREPARACAO DE GASES RICOS EM NITROGENIO A PARTIR DE GASES CONTENDO,ALEM N2,PELO MENOS O2,COMO EXEMPLO,"AR"

ConcedidaInvention Patent

Application data

Number

PI7707657

Type

Invention Patent

Filing

11/18/1976

Publication

-

Progress at the INPI

  1. Filing11/18/76
  2. Publication
  3. Examination
  4. Allowance03/01/83
  5. Grant11/29/83
  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: 11/29/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BERGWERKSVERBAND GMBH

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Inventors

H. H. (pessoa física)

J. H. (pessoa física)

K. K. (pessoa física)

R. J. (pessoa física)

T. F. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/29/1983

RPI 684

Notificação para pagamento de retribuição

#13.1

10/04/1983

RPI 676

9.1.3

05/31/1983

RPI 658

Deferimento

#9.1

03/01/1983

RPI 645

Exigência - art. 36 da LPI

#6.1

01/05/1982

RPI 585

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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