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Official data from INPI

PROCESSO DE CEMENTAÇÃO-DIFUSÃO EM UM FORNO DE CARGA

Em AnáliseInvention Patent

Application data

Number

PI8603866

Type

Invention Patent

Filing

08/13/1986

Publication

03/24/1987

Progress at the INPI

  1. Filing08/13/86
  2. Publication03/24/87
  3. Examination12/20/88
  4. Allowance10/30/90
  5. Grant04/30/91
  6. Terminated10/03/95

The patent was granted on 04/30/1991 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 12/20/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BRASIL OXIGENIO [BR]

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Inventors

P. Q. (pessoa física)

FR

Technical data

IPC Classification

Priority claims

FR

85 12.379 · 08/14/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

12/20/1988

RPI 948

Publicação do pedido de patente

#3.1

03/24/1987

RPI 857

Pedido de patente depositado

#2.1

01/06/1987

RPI 846

Anuidade - prazo legal encerrado

#18.2

10/03/1995

RPI 1296

Concessão da patente

#16.1

04/30/1991

RPI 1065

Notificação para pagamento de retribuição

#13.1

02/13/1991

RPI 1054

Deferimento

#9.1

10/30/1990

RPI 1039

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