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Official data from INPI

SISTEMA DE COMPENSAÇÃO E ALÍVIO DE PRESSÃO APERFEIÇOADO.

Em AnáliseInvention Patent

Application data

Number

PI8705920

Type

Invention Patent

Filing

11/04/1987

Publication

06/14/1988

Progress at the INPI

  1. Filing11/04/87
  2. Publication06/14/88
  3. Examination10/24/89
  4. Allowance03/17/92
  5. Grant01/26/93
  6. Terminated06/25/96

The patent was granted on 01/26/1993 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 10/24/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Hughes Tool Company.

US

Hughes Tool Company - USA

US

See this company's full portfolio

Inventors

A. Z. (pessoa física)

US

E. G. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

927.789 · 11/05/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/24/1989

RPI 992

Publicação do pedido de patente

#3.1

06/14/1988

RPI 921

Pedido de patente depositado

#2.1

02/23/1988

RPI 905

Anuidade - prazo legal encerrado

#18.2

06/25/1996

RPI 1334

Concessão da patente

#16.1

01/26/1993

RPI 1156

Notificação para pagamento de retribuição

#13.1

08/11/1992

RPI 1132

Deferimento

#9.1

03/17/1992

RPI 1111

Exigência - art. 36 da LPI

#6.1

07/02/1991

RPI 1074

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