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Official data from INPI

PROCESSO PARA A PREPARACAO DE FIBRAS DISPERSIVEIS DE SULFATO DE CALCIO,PRODUTO DE FIBRAS DE SULFATO DE CALCIO,SUBSTANCIA COMPOSTA E APERFEICOAMENTO EM PROCESSO PARA PREPARACAO DE RASPA DE FIBRAS DE SULFATO DE CALCIO

Em AnáliseInvention Patent
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Application data

Number

PI7807575

Type

Invention Patent

Filing

11/25/1977

Publication

-
View on INPI

Progress at the INPI

  1. Filing11/25/77
  2. Publication
  3. Examination
  4. Allowance09/18/84
  5. Grant03/26/85
  6. Terminated10/03/89

The patent was granted on 03/26/1985 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 10/03/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CERTAIN TEED CORP

Inventors

W. J. (pessoa física)

Technical data

IPC Classification

C01F 11/46C04B 43/00D01F 9/08

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

10/03/1989

RPI 989

Concessão da patente

#16.1

03/26/1985

RPI 753

Notificação para pagamento de retribuição

#13.1

01/15/1985

RPI 743

Deferimento

#9.1

09/18/1984

RPI 726

Exigência - art. 36 da LPI

#6.1

01/31/1984

RPI 693

Exigência - art. 36 da LPI

#6.1

08/10/1982

RPI 616

6.2

03/16/1982

RPI 595

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