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Official data from INPI

COMPOSICAO FUNDIDA E PROCESSO PARA A PREPARACAO DE MISTURAS ESTAVEIS DE ARGILA E COPOLIMEROS DE ETILENO/ESTER DE VINILA

ConcedidaInvention Patent

Application data

Number

PI7907505

Type

Invention Patent

Filing

11/22/1978

Publication

-

Progress at the INPI

  1. Filing11/22/78
  2. Publication
  3. Examination08/17/82
  4. Allowance05/17/88
  5. Grant11/29/88
  6. Expired05/02/95

The letters patent expired on 05/02/1995: 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: 11/29/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DU PONT

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Inventors

S. F. (pessoa física)

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/29/1988

RPI 945

Notificação para pagamento de retribuição

#13.1

09/06/1988

RPI 933

Deferimento

#9.1

05/17/1988

RPI 917

Exigência - art. 36 da LPI

#6.1

09/22/1987

RPI 883

Republicação - classificação IPC

#15.11

05/02/1984

RPI 706

Conhecimento de parecer técnico

#7.1

10/04/1983

RPI 676

Solicitação de exame técnico

#4.1

08/17/1982

RPI 617

Carta-patente expirada

#21.1

05/02/1995

RPI 1274

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