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Official data from INPI

PROCESSO DE TESTE E ARTIGO PARA ESTIMAR A CONCENTRACAO DE ACIDO LIVRE EM LIQUIDO

ConcedidaInvention Patent

Application data

Number

PI8108925

Type

Invention Patent

Filing

12/19/1980

Publication

11/30/1982

Progress at the INPI

  1. Filing12/19/80
  2. Publication11/30/82
  3. Examination08/07/84
  4. Allowance06/14/88
  5. Grant12/27/88
  6. Expired08/19/08

The letters patent expired on 08/19/2008: 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: 12/27/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MINNESOTA MINING & MFG [US]

See this company's full portfolio

Inventors

M. [. (pessoa física)

N. [. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/27/1988

RPI 949

Notificação para pagamento de retribuição

#13.1

10/04/1988

RPI 937

Deferimento

#9.1

06/14/1988

RPI 921

Exigência - art. 36 da LPI

#6.1

12/08/1987

RPI 894

Exigência - art. 36 da LPI

#6.1

01/29/1985

RPI 745

Solicitação de exame técnico

#4.1

08/07/1984

RPI 720

Notificação de entrada na fase nacional - PCT

#1.3

11/30/1982

RPI 632

Carta-patente expirada

#21.1

Patente extinta em 09/11/96

08/19/2008

RPI 1963

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