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Official data from INPI

APARELHO E PROCESSO PARA A MEDIÇÃO DE CONDUTIVIDADE TÉRMICA DE GÁS DE TESTE

Arquivada/ExtintaInvention Patent

Application data

Number

PI9000506

Type

Invention Patent

Filing

02/06/1990

Publication

01/15/1991

Progress at the INPI

  1. Filing02/06/90
  2. Publication01/15/91
  3. Examination04/13/93
  4. Allowance08/16/94
  5. Grant05/30/95
  6. Expired05/11/10

The letters patent expired on 05/11/2010: 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: 05/11/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Alcan International Limited

CA

See this company's full portfolio

Inventors

D. L. (pessoa física)

CA

J. M. (pessoa física)

CA

R. H. (pessoa física)

CA

Technical data

IPC Classification

Priority claims

US

07/307.318 · 02/06/1989

US

07/448.548 · 12/11/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 06/02/2005

05/11/2010

RPI 2053

Concessão da patente

#16.1

05/30/1995

RPI 1278

Notificação para pagamento de retribuição

#13.1

12/13/1994

RPI 1254

Deferimento

#9.1

08/16/1994

RPI 1237

Solicitação de exame técnico

#4.1

04/13/1993

RPI 1167

Publicação do pedido de patente

#3.1

01/15/1991

RPI 1050

Pedido de patente depositado

#2.1

05/22/1990

RPI 1019

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