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Official data from INPI

SILENCIOSO, CONDUTO DE ESCOAMENTO DE GÁS, MÉTODO DE FABRICAR UM SILENCIOSO RETROVERTIDO E MÉTODO DE REFORMAR UMA SEÇÃO DE TUBO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9102765

Type

Invention Patent

Filing

07/01/1991

Publication

02/04/1992

Progress at the INPI

  1. Filing07/01/91
  2. Publication02/04/92
  3. Examination05/04/93
  4. Allowance10/11/94
  5. Grant06/27/95
  6. Expired06/29/10

The letters patent expired on 06/29/2010: 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: 06/29/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Tennessee Gas Pipeline Company

US

Inventors

B. S. (pessoa física)

US

J. A. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

546.919 · 07/02/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 01/07/2006

06/29/2010

RPI 2060

Concessão da patente

#16.1

06/27/1995

RPI 1282

Notificação para pagamento de retribuição

#13.1

02/21/1995

RPI 1264

Deferimento

#9.1

10/11/1994

RPI 1245

Solicitação de exame técnico

#4.1

05/04/1993

RPI 1170

Publicação do pedido de patente

#3.1

02/04/1992

RPI 1105

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