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Official data from INPI

PROCESSO PARA PREPARAR UMA SOLUCAO AQUOSA DE UM COMPOSTO DE SULFONATO-ORGANOSSILANOL,E PROCESSO PARA TRANSMITIR HIDROFILICIDADE DURAVEL A UM SUBSTRATO TENDO UMA SUPERFICIE SILICOSA

Em AnáliseInvention Patent

Application data

Number

PI7902222

Type

Invention Patent

Filing

04/11/1978

Publication

-

Progress at the INPI

  1. Filing04/11/78
  2. Publication
  3. Examination01/05/82
  4. Allowance04/05/83
  5. Grant10/25/83
  6. Terminated05/17/88

The patent was granted on 10/25/1983 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: 05/17/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MINNESOTA MINING & MFG

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Inventors

B. B. (pessoa física)

L. B. (pessoa física)

S. F. (pessoa física)

T. G. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

05/17/1988

RPI 917

Concessão da patente

#16.1

10/25/1983

RPI 679

Notificação para pagamento de retribuição

#13.1

08/30/1983

RPI 671

Deferimento

#9.1

04/05/1983

RPI 650

6.2

06/22/1982

RPI 609

Solicitação de exame técnico

#4.1

01/05/1982

RPI 585

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