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Official data from INPI

APARELHO PARA MUDAR PELO MENOS UMA PROPRIEDADE SELECIONADA DE UMA SUBSTÂNCIA

PublicadaInvention Patent

Application data

Number

PI8802036

Type

Invention Patent

Filing

04/27/1988

Publication

11/21/1989

Progress at the INPI

  1. Filing04/27/88
  2. Publication11/21/89
  3. Examination01/14/92
  4. Allowance08/26/97
  5. Grant08/25/98
  6. Expired08/26/08

The letters patent expired on 08/26/2008: 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: 11/21/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

W. A. (pessoa física)

US

Inventors

W. A. (pessoa física)

US

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

11/21/1989

RPI 996

Pedido de patente depositado

#2.1

10/25/1988

RPI 940

Carta-patente expirada

#21.1

Patente extinta em 25/08/2008

08/26/2008

RPI 1964

Concessão da patente

#16.1

08/25/1998

RPI 1444

Deferimento

#9.1

08/26/1997

RPI 1395

Exigência - art. 36 da LPI

#6.1

10/01/1996

RPI 1348

Solicitação de exame técnico

#4.1

01/14/1992

RPI 1102

Arquivamento - Art. 33 da LPI

#11.1

10/08/1991

RPI 1088

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