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Official data from INPI

MATERIAL DE TROCA IONICA,EMULSAO AQUOSA,PROCESSO PARA PREPARAR TAL MATERIAL,MATERIAL TROCADOR DE IONS FLOCULADO,E PROCESSO PARA A REMOCAO DE IMPUREZAS IONICAS DE UM LIQUIDO

ConcedidaInvention Patent

Application data

Number

PI7905988

Type

Invention Patent

Filing

09/19/1978

Publication

-

Progress at the INPI

  1. Filing09/19/78
  2. Publication
  3. Examination08/24/82
  4. Allowance10/15/85
  5. Grant05/27/86
  6. Expired04/25/95

The letters patent expired on 04/25/1995: 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: 05/27/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ROHM & HAAS

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Inventors

C. P. (pessoa física)

C. B. (pessoa física)

I. E. (pessoa física)

N. J. (pessoa física)

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/27/1986

RPI 814

Deferimento

#9.1

10/15/1985

RPI 782

Exigência - art. 36 da LPI

#6.1

11/27/1984

RPI 736

Exigência - art. 36 da LPI

#6.1

01/31/1984

RPI 693

Solicitação de exame técnico

#4.1

08/24/1982

RPI 618

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

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