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Official data from INPI

CONSTRUÇÃO MODULAR PARA REVESTIMENTO DE CROSS PIPES E COLUNAS REFRIGERADAS DE FORNOS WALKING-BEAM OU PUSHER PARA AQUECIMENTO DE AÇO.

Em AnáliseInvention Patent

Application data

Number

PI8304720

Type

Invention Patent

Filing

08/31/1983

Publication

04/09/1985

Progress at the INPI

  1. Filing08/31/83
  2. Publication04/09/85
  3. Examination02/04/86
  4. Allowance02/09/88
  5. Grant08/30/88
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 06/06/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Babcock & Wilcox Fibras Cerâmicas Ltda

Morganite Isolantes Térmicos Ltda

RJ, BR

Inventors

R. M. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

06/06/1989

RPI 972

20.7

06/06/1989

RPI 972

Concessão da patente

#16.1

08/30/1988

RPI 932

Notificação para pagamento de retribuição

#13.1

06/07/1988

RPI 920

Deferimento

#9.1

02/09/1988

RPI 903

Solicitação de exame técnico

#4.1

02/04/1986

RPI 798

Publicação do pedido de patente

#3.1

04/09/1985

RPI 755

Pedido de patente depositado

#2.1

11/01/1983

RPI 680

Carta-patente expirada

#21.1

Patente extinta em 31/08/98

07/01/2008

RPI 1956

20.4

03/30/1993

RPI 1165

20.4

11/05/1991

RPI 1092

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