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Official data from INPI

PROCESSO PARA A POLIMERIZAÇÃO DE HOMO OU COPOLÍMERO DE CLORETO DE POLIVINILA

Em AnáliseInvention Patent

Application data

Number

PI8505065

Type

Invention Patent

Filing

10/11/1985

Publication

07/29/1986

Progress at the INPI

  1. Filing10/11/85
  2. Publication07/29/86
  3. Examination10/29/86
  4. Allowance10/26/93
  5. Grant05/31/94
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 02/24/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shin-Etsu Chemical Co., Ltd.

JP

See this company's full portfolio

Inventors

G. N. (pessoa física)

JP

K. I. (pessoa física)

US

Technical data

IPC Classification

Priority claims

JP

59-214075 · 10/12/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de certificado de adição de invenção

#5.1

02/24/1987

RPI 853

Solicitação de exame técnico

#4.1

10/29/1986

RPI 836

Publicação do pedido de patente

#3.1

07/29/1986

RPI 823

Pedido de patente depositado

#2.1

12/17/1985

RPI 791

Carta-patente expirada

#21.1

Patente extinta em 11/10/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

05/31/1994

RPI 1226

Deferimento

#9.1

10/26/1993

RPI 1195

Exigência - art. 36 da LPI

#6.1

05/04/1993

RPI 1170

Exigência - art. 36 da LPI

#6.1

06/11/1991

RPI 1071

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