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Official data from INPI

APERFEIÇOAMENTO DO ACIONAMENTO DE VÁLVULA ÓCULOS

PublicadaInvention Patent

Application data

Number

PI8701943

Type

Invention Patent

Filing

04/24/1987

Publication

11/01/1988

Progress at the INPI

  1. Filing04/24/87
  2. Publication11/01/88
  3. Examination11/27/90
  4. Allowance06/01/93
  5. Grant04/26/94
  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: 11/01/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Companhia Siderúrgica Paulista - Cosipa (Grupo Siderbrás)

SP, BR

Inventors

R. O. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

11/01/1988

RPI 941

Pedido de patente depositado

#2.1

07/28/1987

RPI 875

Carta-patente expirada

#21.1

Patente extinta em 24/04/2002

07/29/2008

RPI 1960

20.7

10/25/1994

RPI 1247

Concessão da patente

#16.1

04/26/1994

RPI 1221

Notificação para pagamento de retribuição

#13.1

10/13/1993

RPI 1193

Deferimento

#9.1

06/01/1993

RPI 1174

Exigência - art. 36 da LPI

#6.1

09/22/1992

RPI 1138

15.18

03/10/1992

RPI 1110

Retificação

#15.3

11/05/1991

RPI 1092

Solicitação de exame técnico

#4.1

11/27/1990

RPI 1043

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