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Official data from INPI

PROCESSO E DISPOSITIVO PARA PREPARACAO DE GRANULOS DE POLIMEROS DE TAMANHO UNIFORME

ConcedidaInvention Patent

Application data

Number

PI8107167

Type

Invention Patent

Filing

10/30/1980

Publication

07/20/1982

Progress at the INPI

  1. Filing10/30/80
  2. Publication07/20/82
  3. Examination10/02/84
  4. Allowance08/26/86
  5. Grant06/30/87
  6. Expired08/19/08

The letters patent expired on 08/19/2008: 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: 06/30/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DOW CHEMICAL CO [US]

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Inventors

T. E. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/30/1987

RPI 871

Notificação para pagamento de retribuição

#13.1

12/09/1986

RPI 842

Deferimento

#9.1

08/26/1986

RPI 827

Exigência - art. 36 da LPI

#6.1

07/02/1985

RPI 767

Solicitação de exame técnico

#4.1

10/02/1984

RPI 728

Publicação do pedido de patente

#3.1

07/20/1982

RPI 613

Pedido de patente depositado

#2.1

12/22/1981

RPI 583

Carta-patente expirada

#21.1

Patente extinta em 30/10/96

08/19/2008

RPI 1963

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