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Official data from INPI

PROCESSO PARA PREPARAR UMA PARTÍCULA ABRASIVA DE CERÂMICA, E, PROCESSO PARA POLIR UMA SUPERFÍCIE

Em AnáliseInvention Patent

Application data

Number

PI8706185

Type

Invention Patent

Filing

11/17/1987

Publication

06/21/1988

Progress at the INPI

  1. Filing11/17/87
  2. Publication06/21/88
  3. Examination08/30/88
  4. Allowance03/14/95
  5. Grant09/26/95
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 08/30/1988. 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

J. M. (pessoa física)

US

W. W. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

933.014 · 11/20/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

08/30/1988

RPI 932

Publicação do pedido de patente

#3.1

06/21/1988

RPI 922

Pedido de patente depositado

#2.1

02/23/1988

RPI 905

Carta-patente expirada

#21.1

Patente extinta em 17/11/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

09/26/1995

RPI 1295

Deferimento

#9.1

03/14/1995

RPI 1267

Exigência - art. 36 da LPI

#6.1

08/16/1994

RPI 1237

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