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Official data from INPI

SEM TITULO

ConcedidaInvention Patent

Application data

Number

PI8100426

Type

Invention Patent

Filing

01/23/1981

Publication

-

Progress at the INPI

  1. Filing01/23/81
  2. Publication
  3. Examination10/11/83
  4. Allowance10/27/87
  5. Grant06/28/88
  6. Expired03/19/96

The letters patent expired on 03/19/1996: 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: 06/28/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Dow Chemical Company.

US

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Inventors

L. G. (pessoa física)

V. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/28/1988

RPI 923

Notificação para pagamento de retribuição

#13.1

03/01/1988

RPI 906

Deferimento

#9.1

10/27/1987

RPI 888

Solicitação de exame técnico

#4.1

10/11/1983

RPI 677

Carta-patente expirada

#21.1

03/19/1996

RPI 1320

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