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Official data from INPI

PROCESSO PARA SINTETIZAR POLIMERO SULFONADOS SOLÚVEIS EM ÁGUA

Em AnáliseInvention Patent

Application data

Number

PI8606292

Type

Invention Patent

Filing

12/19/1986

Publication

07/05/1988

Progress at the INPI

  1. Filing12/19/86
  2. Publication07/05/88
  3. Examination08/15/89
  4. Allowance06/20/95
  5. Grant12/26/95
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 08/15/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Nalco Chemical Company

US

See this company's full portfolio

Inventors

D. F. (pessoa física)

US

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

08/15/1989

RPI 982

Publicação do pedido de patente

#3.1

07/05/1988

RPI 924

Pedido de patente depositado

#2.1

04/28/1987

RPI 862

Carta-patente expirada

#21.1

Patente extinta em 19/12/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

12/26/1995

RPI 1308

Notificação para pagamento de retribuição

#13.1

10/31/1995

RPI 1300

Deferimento

#9.1

06/20/1995

RPI 1281

Exigência - art. 36 da LPI

#6.1

11/30/1993

RPI 1200

Exigência - art. 36 da LPI

#6.1

05/04/1993

RPI 1170

Exigência - art. 36 da LPI

#6.1

11/05/1991

RPI 1092

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