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Official data from INPI

PROCESSO PARA PREPARAÇÃO DE UM POLÍMERO DE ORGANOSSILICIO RETICULADO OU RETICULÁVEL.

PublicadaInvention Patent

Application data

Number

PI8704416

Type

Invention Patent

Filing

08/27/1987

Publication

04/19/1988

Progress at the INPI

  1. Filing08/27/87
  2. Publication04/19/88
  3. Examination10/30/90
  4. Allowance01/12/99
  5. Grant08/24/99
  6. Expired12/11/12

The letters patent expired on 12/11/2012: 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: 04/19/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

H. I. (pessoa física)

US

National Starch And Chemical Investment Holding Corporation

US

See this company's full portfolio

Inventors

R. L. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

079.740 · 07/30/1987

US

901.092 · 08/27/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

04/19/1988

RPI 913

Pedido de patente depositado

#2.1

11/17/1987

RPI 891

Carta-patente expirada

#21.1

Patente extinta em 24/08/2009

12/11/2012

RPI 2188

Transferência deferida

#25.1

Transferido de: Hercules Incorporated.

10/26/1999

RPI 1503

Concessão da patente

#16.1

08/24/1999

RPI 1494

Deferimento

#9.1

01/12/1999

RPI 1462

Exigência - art. 36 da LPI

#6.1

06/23/1998

RPI 1435

Exigência - art. 36 da LPI

#6.1

01/14/1992

RPI 1102

Solicitação de exame técnico

#4.1

10/30/1990

RPI 1039

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