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Official data from INPI

APERFEICOAMENTO EM PROCESSO PARA PRODUZIR COPOLIMERO EM BLOCO DE PROPILENO-ETILENO

ConcedidaInvention Patent

Application data

Number

PI7903182

Type

Invention Patent

Filing

05/22/1978

Publication

-

Progress at the INPI

  1. Filing05/22/78
  2. Publication
  3. Examination12/22/81
  4. Allowance03/22/83
  5. Grant09/27/83
  6. Expired07/26/94

The letters patent expired on 07/26/1994: 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: 09/27/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SUMITOMO CHEMICAL CO

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Inventors

F. Y. (pessoa física)

K. M. (pessoa física)

S. H. (pessoa física)

S. A. (pessoa física)

W. K. (pessoa física)

Y. K. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/27/1983

RPI 675

Notificação para pagamento de retribuição

#13.1

08/02/1983

RPI 667

Deferimento

#9.1

03/22/1983

RPI 648

6.2

06/22/1982

RPI 609

Solicitação de exame técnico

#4.1

12/22/1981

RPI 583

Carta-patente expirada

#21.1

07/26/1994

RPI 1234

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