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Official data from INPI

DISPERSÕES AQUOSAS DE PARTÍCULAS DE POLÍMEROS PLASTIFICADOS E PROCESSO PARA PREPARAÇÃO DAS MESMAS

ConcedidaInvention Patent

Application data

Number

PI8306929

Type

Invention Patent

Filing

12/09/1983

Publication

07/24/1984

Progress at the INPI

  1. Filing12/09/83
  2. Publication07/24/84
  3. Examination08/12/86
  4. Allowance11/16/88
  5. Grant09/26/89
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 09/26/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Dow Chemical Company

US

See this company's full portfolio

Inventors

D. L. (pessoa física)

US

F. S. (pessoa física)

US

W. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

449.297 · 12/13/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/26/1989

RPI 988

Notificação para pagamento de retribuição

#13.1

03/07/1989

RPI 959

Deferimento

#9.1

11/16/1988

RPI 943

Exigência - art. 36 da LPI

#6.1

03/29/1988

RPI 910

Solicitação de exame técnico

#4.1

08/12/1986

RPI 825

Publicação do pedido de patente

#3.1

07/24/1984

RPI 718

Pedido de patente depositado

#2.1

02/28/1984

RPI 697

Carta-patente expirada

#21.1

Patente extinta em 09/12/98

07/01/2008

RPI 1956

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