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Official data from INPI

APARELHO PARA REDUZIR RUÍDO EM SINAIS DE AUDIO

Em ExigênciaInvention Patent

Application data

Number

PI8501854

Type

Invention Patent

Filing

04/18/1985

Publication

12/17/1985

Progress at the INPI

  1. Filing04/18/85
  2. Publication12/17/85
  3. Examination02/17/87
  4. Allowance10/22/91
  5. Grant08/25/92
  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: 05/30/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Matsushita Electric Industrial CO., Ltd.

JP

See this company's full portfolio

Inventors

S. H. (pessoa física)

JP

Technical data

IPC Classification

Priority claims

JP

188365/84 · 09/07/1984

JP

80422/84 · 04/20/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

6.2

05/30/1989

RPI 971

Solicitação de exame técnico

#4.1

02/17/1987

RPI 852

Publicação do pedido de patente

#3.1

12/17/1985

RPI 791

Pedido de patente depositado

#2.1

07/02/1985

RPI 767

Carta-patente expirada

#21.1

Patente extinta em 18/04/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

08/25/1992

RPI 1134

Notificação para pagamento de retribuição

#13.1

03/03/1992

RPI 1109

Deferimento

#9.1

10/22/1991

RPI 1090

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