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Official data from INPI

PROCESSO PARA TRATAMENTO DE UM SUBSTRATO

Em AnáliseInvention Patent

Application data

Number

PI8602401

Type

Invention Patent

Filing

05/27/1986

Publication

01/21/1987

Progress at the INPI

  1. Filing05/27/86
  2. Publication01/21/87
  3. Examination02/08/89
  4. Allowance10/19/93
  5. Grant05/31/94
  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: 02/08/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Minnesota Mining and Manufacturing Company

US

See this company's full portfolio

Inventors

D. K. (pessoa física)

US

T. B. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

737.938 · 05/28/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

02/08/1989

RPI 955

Publicação do pedido de patente

#3.1

01/21/1987

RPI 848

Pedido de patente depositado

#2.1

11/25/1986

RPI 840

Carta-patente expirada

#21.1

Patente extinta em 27/05/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

05/31/1994

RPI 1226

Deferimento

#9.1

10/19/1993

RPI 1194

Exigência - art. 36 da LPI

#6.1

07/14/1992

RPI 1128

Exigência - art. 36 da LPI

#6.1

06/18/1991

RPI 1072

6.2

01/02/1990

RPI 1000

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