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Official data from INPI

DISPERSOES DE COPOLIMEROS EM COMPOSTOS POLIFUNCIONAIS,TENDO UMA SERIE DE HIDROGENIOS ATIVOS,METODO PARA FAZER AS DISPERSOES DE COPOLIMEROS E UMA COMPOSICAO DE POLIURETANA PREPARADA

ConcedidaInvention Patent

Application data

Number

PI8007670

Type

Invention Patent

Filing

11/23/1979

Publication

-

Progress at the INPI

  1. Filing11/23/79
  2. Publication
  3. Examination10/06/81
  4. Allowance09/15/87
  5. Grant05/31/88
  6. Expired12/26/95

The letters patent expired on 12/26/1995: 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: 05/31/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Dow Chemcial Company

US

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Inventors

H. R. (pessoa física)

H. D. (pessoa física)

R. R. (pessoa física)

T. N. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1988

RPI 919

Notificação para pagamento de retribuição

#13.1

01/26/1988

RPI 901

Deferimento

#9.1

09/15/1987

RPI 882

Exigência - art. 36 da LPI

#6.1

09/18/1984

RPI 726

6.2

12/07/1982

RPI 633

Solicitação de exame técnico

#4.1

10/06/1981

RPI 572

Carta-patente expirada

#21.1

12/26/1995

RPI 1308

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