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Official data from INPI

PROCESSO PARA CONTROLAR A FORMAÇÃO DE INCRUSTAÇÃO DE SÍLICA OU SILICATO EM UM SISTEMA AQUOSO

Arquivada/ExtintaInvention Patent
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Application data

Number

PI9102087

Type

Invention Patent

Filing

05/21/1991

Publication

12/24/1991
View on INPI

Progress at the INPI

  1. Filing05/21/91
  2. Publication12/24/91
  3. Examination12/07/93
  4. Allowance05/25/99
  5. Grant11/16/99
  6. Expired06/04/13

The letters patent expired on 06/04/2013: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 06/04/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Rohm And Haas Company

US

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Inventors

J. S. (pessoa física)

US

J. B. (pessoa física)

US

S. R. (pessoa física)

US

W. H. (pessoa física)

US

Technical data

IPC Classification

C02F 5/12

Priority claims

US

527,420 · 05/23/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 21/05/2011

06/04/2013

RPI 2213

Concessão da patente

#16.1

11/16/1999

RPI 1506

Deferimento

#9.1

05/25/1999

RPI 1481

Exigência - art. 36 da LPI

#6.1

11/24/1998

RPI 1455

Exigência - art. 36 da LPI

#6.1

05/12/1998

RPI 1429

Solicitação de exame técnico

#4.1

12/07/1993

RPI 1201

Publicação do pedido de patente

#3.1

12/24/1991

RPI 1099

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