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Official data from INPI

PROCESSO PARA A PRODUÇÃO DE PARTÍCULAS DE ALFA ALUMINA NANO-DIMENSIONADAS

Arquivada/ExtintaInvention Patent

Application data

Number

PI9300492

Type

Invention Patent

Filing

02/04/1993

Publication

08/10/1993

Progress at the INPI

  1. Filing02/04/93
  2. Publication08/10/93
  3. Examination12/07/93
  4. Allowance02/22/00
  5. Grant07/11/00
  6. Expired09/23/14

The letters patent expired on 09/23/2014: 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: 09/23/2014. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Norton Company

US

See this company's full portfolio

Inventors

A. G. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

831588 · 02/05/1992

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 04/02/2013

09/23/2014

RPI 2281

Concessão da patente

#16.1

07/11/2000

RPI 1540

Deferimento

#9.1

02/22/2000

RPI 1520

Exigência - art. 36 da LPI

#6.1

05/04/1999

RPI 1478

Exigência - art. 36 da LPI

#6.1

12/01/1998

RPI 1456

Solicitação de exame técnico

#4.1

12/07/1993

RPI 1201

Publicação do pedido de patente

#3.1

08/10/1993

RPI 1184

Pedido de patente depositado

#2.1

03/23/1993

RPI 1164

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