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Official data from INPI

SILENCIADOR E COMPONENTE ACÚSTICO

PublicadaInvention Patent

Application data

Number

PI8704062

Type

Invention Patent

Filing

08/07/1987

Publication

04/12/1988

Progress at the INPI

  1. Filing08/07/87
  2. Publication04/12/88
  3. Examination10/30/90
  4. Allowance11/05/91
  5. Grant09/29/92
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 04/12/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Tennessee Gas Pipeline Company

US

Inventors

T. H. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

894.634 · 08/08/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

04/12/1988

RPI 912

Pedido de patente depositado

#2.1

11/10/1987

RPI 890

Carta-patente expirada

#21.1

Patente extinta em 07/08/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

09/29/1992

RPI 1139

Notificação para pagamento de retribuição

#13.1

03/17/1992

RPI 1111

Republicação - classificação IPC

#15.11

12/24/1991

RPI 1099

Deferimento

#9.1

11/05/1991

RPI 1092

14.4

07/16/1991

RPI 1076

Solicitação de exame técnico

#4.1

10/30/1990

RPI 1039

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