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Official data from INPI

PROCESSO PARA DESTILAÇÃO DE UM COMPOSTO VINIL-AROMÁTICO FÁCIL DE POLIMERIZAR E APARELHO PARA SUA EXECUÇÃO.

ConcedidaInvention Patent

Application data

Number

PI7904432

Type

Invention Patent

Filing

07/12/1979

Publication

-

Progress at the INPI

  1. Filing07/12/79
  2. Publication
  3. Examination03/16/82
  4. Allowance12/26/84
  5. Grant06/25/85
  6. Expired04/18/95

The letters patent expired on 04/18/1995: 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: 06/25/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Cosden Technology Inc.

US

Inventors

W. J. (pessoa física)

Technical data

Priority claims

US

925.818 · 07/18/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/25/1985

RPI 766

Notificação para pagamento de retribuição

#13.1

04/16/1985

RPI 756

Deferimento

#9.1

12/26/1984

RPI 740

Exigência - art. 36 da LPI

#6.1

02/07/1984

RPI 694

6.2

02/01/1983

RPI 641

Pedido de certificado de adição de invenção

#5.1

08/31/1982

RPI 619

Solicitação de exame técnico

#4.1

03/16/1982

RPI 595

Carta-patente expirada

#21.1

04/18/1995

RPI 1272

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