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Official data from INPI

PROCESSO CONTÍNUO PARA PREPARAR HOMOPOLÍMERO DE TETRAFLUOROETILENO OU COPOLÍMEROS DE TETRAFLUOROETILENO E PELO MENOS UM COMONÔMERO COPOLIMERIZÁVEL FLUORADO COM ISATURAÇÃO ETILÊNICA

ConcedidaInvention Patent

Application data

Number

PI8204568

Type

Invention Patent

Filing

08/04/1982

Publication

07/26/1983

Progress at the INPI

  1. Filing08/04/82
  2. Publication07/26/83
  3. Examination10/18/83
  4. Allowance10/08/85
  5. Grant05/27/86
  6. Terminated02/11/92

The patent was granted on 05/27/1986 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: 05/27/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DU PONT [US]

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Inventors

A. K. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

293.333 · 08/17/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/27/1986

RPI 814

Deferimento

#9.1

10/08/1985

RPI 781

Exigência - art. 36 da LPI

#6.1

12/04/1984

RPI 737

Solicitação de exame técnico

#4.1

10/18/1983

RPI 678

Publicação do pedido de patente

#3.1

07/26/1983

RPI 666

Pedido de patente depositado

#2.1

09/21/1982

RPI 622

Anuidade - prazo legal encerrado

#18.2

02/11/1992

RPI 1106

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