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Official data from INPI

APERFEIÇOAMENTO EM AQUECEDOR ELÉTRICO TUBULAR FLEXÍVEL, E, PROCESSO PARA SUA FORMAÇÃO.

Em AnáliseInvention Patent

Application data

Number

PI8506157

Type

Invention Patent

Filing

12/09/1985

Publication

06/30/1987

Progress at the INPI

  1. Filing12/09/85
  2. Publication06/30/87
  3. Examination07/18/89
  4. Allowance12/08/92
  5. Grant11/30/93
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 10/31/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

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Inventors

W. I. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de certificado de adição de invenção

#5.1

10/31/1989

RPI 993

Solicitação de exame técnico

#4.1

07/18/1989

RPI 978

Publicação do pedido de patente

#3.1

06/30/1987

RPI 871

Pedido de patente depositado

#2.1

02/25/1986

RPI 801

Carta-patente expirada

#21.1

Patente extinta em 09/12/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

11/30/1993

RPI 1200

110

10/05/1993

RPI 1192

Recurso

#12.1

04/27/1993

RPI 1169

Deferimento

#9.1

12/08/1992

RPI 1149

Exigência - art. 36 da LPI

#6.1

05/26/1992

RPI 1121

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