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Official data from INPI

PRÉ-AQUECEDOR DE MATERIAL DE CARGA PARA PRÉ-AQUECIMENTO DE MATERIAL DE CARGA PARA UNIDADE DE REDUÇÃO METALÚRGICA

Em AnáliseInvention Patent

Application data

Number

PI8801884

Type

Invention Patent

Filing

04/20/1988

Publication

11/22/1988

Progress at the INPI

  1. Filing04/20/88
  2. Publication11/22/88
  3. Examination05/16/89
  4. Allowance01/02/91
  5. Grant09/24/91
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 05/16/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Kortec AG

CH

See this company's full portfolio

Inventors

R. W. (pessoa física)

BR

Technical data

IPC Classification

Priority claims

DE

P 37 13 369.1 · 04/21/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

05/16/1989

RPI 969

Publicação do pedido de patente

#3.1

11/22/1988

RPI 944

Pedido de patente depositado

#2.1

08/30/1988

RPI 932

Carta-patente expirada

#21.1

Patente extinta em 20/04/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

09/24/1991

RPI 1086

Notificação para pagamento de retribuição

#13.1

04/16/1991

RPI 1063

Deferimento

#9.1

01/02/1991

RPI 1048

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