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Official data from INPI

TROCADOR DE CALOR PARA DOIS MEIOS FLUÍDOS

Em AnáliseInvention Patent

Application data

Number

PI8702462

Type

Invention Patent

Filing

05/13/1987

Publication

12/06/1988

Progress at the INPI

  1. Filing05/13/87
  2. Publication12/06/88
  3. Examination10/17/89
  4. Allowance09/25/90
  5. Grant04/30/91
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 10/17/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Ing. Walter Hengst GmbH & Co. KG.

DE

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Inventors

D. B. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/17/1989

RPI 991

Publicação do pedido de patente

#3.1

12/06/1988

RPI 946

Pedido de patente depositado

#2.1

08/04/1987

RPI 876

Carta-patente expirada

#21.1

Patente extinta em 13/05/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

04/30/1991

RPI 1065

Notificação para pagamento de retribuição

#13.1

01/08/1991

RPI 1049

Deferimento

#9.1

09/25/1990

RPI 1034

Exigência - art. 36 da LPI

#6.1

05/01/1990

RPI 1016

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