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Official data from INPI

PROCESSO PARA O ENRIQUECIMENTO DA ATMOSFERA DE FORNOS DE TRATAMENTOS TERMOQUÍMICOS DE PEÇAS METÁLICAS

Em AnáliseInvention Patent
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Application data

Number

PI8504616

Type

Invention Patent

Filing

09/20/1985

Publication

04/28/1987
View on INPI

Progress at the INPI

  1. Filing09/20/85
  2. Publication04/28/87
  3. Examination06/23/87
  4. Allowance04/30/91
  5. Grant11/26/91
  6. Terminated06/04/96

The patent was granted on 11/26/1991 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: 06/23/1987. 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

C21D 1/76C23C 8/20C23C 8/30

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

06/23/1987

RPI 870

Publicação do pedido de patente

#3.1

04/28/1987

RPI 862

Pedido de patente depositado

#2.1

11/19/1985

RPI 787

Anuidade - prazo legal encerrado

#18.2

06/04/1996

RPI 1331

Concessão da patente

#16.1

11/26/1991

RPI 1095

Republicação - classificação IPC

#15.11

11/05/1991

RPI 1092

Notificação para pagamento de retribuição

#13.1

08/13/1991

RPI 1080

Deferimento

#9.1

04/30/1991

RPI 1065

Exigência - art. 36 da LPI

#6.1

10/02/1990

RPI 1035

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