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Official data from INPI

PROCESSO E DISPOSITIVO PARA A PROTECAO DAS TUBEIRAS E DO REVESTIMENTO REFRATARIO DE UM RECIPIENTE PARA A REFINACAO DE UM METAL EM FUSAO

ConcedidaInvention Patent
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Application data

Number

PI8108907

Type

Invention Patent

Filing

12/05/1980

Publication

10/26/1982
View on INPI

Progress at the INPI

  1. Filing12/05/80
  2. Publication10/26/82
  3. Examination05/03/83
  4. Allowance08/23/88
  5. Grant05/30/89
  6. Expired08/19/08

The letters patent expired on 08/19/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 05/30/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

KORF IND HANDEL [DE]

Inventors

N. D. (pessoa física)

W. W. (pessoa física)

Technical data

IPC Classification

C21C 1/00

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/30/1989

RPI 971

Notificação para pagamento de retribuição

#13.1

12/13/1988

RPI 947

Deferimento

#9.1

08/23/1988

RPI 931

Exigência - art. 36 da LPI

#6.1

04/22/1987

RPI 861

Exigência - art. 36 da LPI

#6.1

05/13/1986

RPI 812

14.1

10/08/1985

RPI 781

Exigência - art. 36 da LPI

#6.1

05/22/1984

RPI 709

Solicitação de exame técnico

#4.1

05/03/1983

RPI 654

Notificação de entrada na fase nacional - PCT

#1.3

10/26/1982

RPI 627

Carta-patente expirada

#21.1

Patente extinta em 03/12/96

08/19/2008

RPI 1963

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