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Official data from INPI

PROCESSO PARA O ENRIQUECIMENTO DA ATMOSFERA DE FORNOS DE TRATAMENTOS TERMOQUÍMICOS DE CARBONETAÇÃO E CARBONITRETAÇÃO

ConcedidaInvention Patent
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Application data

Number

PI8404963

Type

Invention Patent

Filing

10/02/1984

Publication

05/06/1986
View on INPI

Progress at the INPI

  1. Filing10/02/84
  2. Publication05/06/86
  3. Examination08/26/86
  4. Allowance03/20/90
  5. Grant09/26/89
  6. Terminated12/24/96

The patent was granted on 09/26/1989 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: 09/26/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Aichelin Indústria e Comércio de Fornos Industriais Ltda.

SP, BR

Inventors

W. G. (pessoa física)

BR

Technical data

IPC Classification

C23C 8/22C23C 8/32

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/26/1989

RPI 988

Notificação para pagamento de retribuição

#13.1

04/25/1989

RPI 966

Republicação - classificação IPC

#15.11

01/10/1989

RPI 951

Deferimento

#9.1

12/13/1988

RPI 947

Solicitação de exame técnico

#4.1

08/26/1986

RPI 827

Publicação do pedido de patente

#3.1

05/06/1986

RPI 811

Pedido de patente depositado

#2.1

12/11/1984

RPI 738

Anuidade - prazo legal encerrado

#18.2

12/24/1996

RPI 1360

13.2

11/27/1990

RPI 1043

Deferimento (variante)

#9.1.2

11/27/1990

RPI 1043

Notificação para pagamento de retribuição

#13.1

07/31/1990

RPI 1026

Deferimento

#9.1

03/20/1990

RPI 1010

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