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Official data from INPI

PROCESSO PARA FABRICAR GRÃOS ABRASIVOS DE CERÂMICA, GRÃOS ABRASIVOS, E, PRODUTO ABRASIVO

Arquivada/ExtintaInvention Patent

Application data

Number

PI8905224

Type

Invention Patent

Filing

10/13/1989

Publication

05/15/1990

Progress at the INPI

  1. Filing10/13/89
  2. Publication05/15/90
  3. Examination10/16/90
  4. Allowance08/04/98
  5. Grant12/29/98
  6. Expired12/26/12

The letters patent expired on 12/26/2012: 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: 12/26/2012. 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

R. K. (pessoa física)

US

V. W. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

258,196 · 10/14/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 13/10/2009

12/26/2012

RPI 2190

Concessão da patente

#16.1

12/29/1998

RPI 1460

Republicação - classificação IPC

#15.11

Alterada a classificação de C04B 35/10.

08/04/1998

RPI 1441

Deferimento

#9.1

08/04/1998

RPI 1441

Exigência - art. 36 da LPI

#6.1

07/18/1995

RPI 1285

Solicitação de exame técnico

#4.1

10/16/1990

RPI 1037

Publicação do pedido de patente

#3.1

05/15/1990

RPI 1018

Pedido de patente depositado

#2.1

03/27/1990

RPI 1011

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