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Official data from INPI

MÉTODO PARA MELHORAR O DESEMPENHO DE UM PROCESSO PARA A PRODUÇÃO DE ALQUIL- HALOSSILANAS E SILÍCIO ASSIM PRODUZIDO.

Em AnáliseInvention Patent

Application data

Number

PI8706946

Type

Invention Patent

Filing

12/21/1987

Publication

07/26/1988

Progress at the INPI

  1. Filing12/21/87
  2. Publication07/26/88
  3. Examination11/22/88
  4. Allowance04/09/96
  5. Grant03/25/97
  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: 11/22/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

D. C. (pessoa física)

US

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Inventors

O. W. (pessoa física)

GB

R. H. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

944317 · 12/22/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

11/22/1988

RPI 944

Publicação do pedido de patente

#3.1

07/26/1988

RPI 927

Pedido de patente depositado

#2.1

03/29/1988

RPI 910

Carta-patente expirada

#21.1

Patente extinta em 21/12/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

03/25/1997

RPI 1373

Deferimento

#9.1

04/09/1996

RPI 1323

Exigência - art. 36 da LPI

#6.1

07/18/1995

RPI 1285

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