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Official data from INPI

PROCESSO PARA PREPARAÇÃO DE UM PRODUTO ABRASIVO REVESTIDO

PublicadaInvention Patent

Application data

Number

PI8704055

Type

Invention Patent

Filing

08/07/1987

Publication

04/05/1988

Progress at the INPI

  1. Filing08/07/87
  2. Publication04/05/88
  3. Examination10/23/90
  4. Allowance05/04/93
  5. Grant10/26/93
  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: 04/05/1988. 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

A. R. (pessoa física)

US

D. B. (pessoa física)

US

M. T. (pessoa física)

US

Technical data

Priority claims

US

895.315 · 08/11/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

04/05/1988

RPI 911

Pedido de patente depositado

#2.1

11/10/1987

RPI 890

Carta-patente expirada

#21.1

Patente extinta em 07/08/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

10/26/1993

RPI 1195

Notificação para pagamento de retribuição

#13.1

09/08/1993

RPI 1188

Deferimento

#9.1

05/04/1993

RPI 1170

Exigência - art. 36 da LPI

#6.1

09/29/1992

RPI 1139

Solicitação de exame técnico

#4.1

10/23/1990

RPI 1038

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