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Official data from INPI

Processo de obtenção de uma sílica de precipitação fina e dita sílica.

ConcedidaInvention Patent

Application data

Number

PI8008343

Type

Invention Patent

Filing

12/19/1980

Publication

-

Progress at the INPI

  1. Filing12/19/80
  2. Publication
  3. Examination08/30/83
  4. Allowance08/11/87
  5. Grant02/23/88
  6. Terminated08/09/94

The patent was granted on 02/23/1988 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 02/23/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Rhone-Poulenc Industries

FR

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Inventors

C. Y. (pessoa física)

D. D. (pessoa física)

V. G. (pessoa física)

Technical data

IPC Classification

Priority claims

FR

79 31216 · 12/20/1979

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/23/1988

RPI 905

Notificação para pagamento de retribuição

#13.1

12/01/1987

RPI 893

Deferimento

#9.1

08/11/1987

RPI 877

Exigência - art. 36 da LPI

#6.1

04/22/1986

RPI 809

Exigência - art. 36 da LPI

#6.1

10/08/1985

RPI 781

Solicitação de exame técnico

#4.1

08/30/1983

RPI 671

Anuidade - prazo legal encerrado

#18.2

08/09/1994

RPI 1236

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