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Official data from INPI

Processo para o tratamento de um artigo de alumínio que compreende a limpeza, desoxidação e revestimento com conversão do artigo de alumínio

Arquivada/ExtintaInvention Patent

Application data

Number

PI8903578

Type

Invention Patent

Filing

07/19/1989

Publication

04/17/1990

Progress at the INPI

  1. Filing07/19/89
  2. Publication04/17/90
  3. Examination04/21/92
  4. Allowance08/12/97
  5. Grant07/28/98
  6. Expired12/26/12

The letters patent expired on 12/26/2012: 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: 12/26/2012. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

H. C. (pessoa física)

US

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Inventors

M. M. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

221,065 · 07/19/1988

US

374,992 · 07/07/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 19/07/2009

12/26/2012

RPI 2190

Concessão da patente

#16.1

07/28/1998

RPI 1440

Deferimento

#9.1

08/12/1997

RPI 1393

Conhecimento de parecer técnico

#7.1

04/30/1996

RPI 1326

Solicitação de exame técnico

#4.1

04/21/1992

RPI 1116

Publicação do pedido de patente

#3.1

04/17/1990

RPI 1014

Pedido de patente depositado

#2.1

03/20/1990

RPI 1010

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