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Official data from INPI

PROCESSO DE PREPARAÇÃO DE ÓXIDO DE ZIRCÔNIO HIDRATADO A PARTIR DE ÓXIDO DE ZI CÔNIO CRISTALIZADO GRANULAR

PublicadaInvention Patent

Application data

Number

PI8901272

Type

Invention Patent

Filing

03/20/1989

Publication

11/07/1989

Progress at the INPI

  1. Filing03/20/89
  2. Publication11/07/89
  3. Examination10/09/90
  4. Allowance01/31/95
  5. Grant07/25/95
  6. Expired12/15/09

The letters patent expired on 12/15/2009: 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: 11/07/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

S. R. (pessoa física)

FR

Inventors

D. U. (pessoa física)

FR

J. R. (pessoa física)

FR

P. F. (pessoa física)

FR

Technical data

IPC Classification

Priority claims

FR

88 03681 · 03/22/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

11/07/1989

RPI 994

Pedido de patente depositado

#2.1

05/09/1989

RPI 968

Carta-patente expirada

#21.1

Patente extinta em 20/03/2004

12/15/2009

RPI 2032

Concessão da patente

#16.1

07/25/1995

RPI 1286

Deferimento

#9.1

01/31/1995

RPI 1261

Solicitação de exame técnico

#4.1

10/09/1990

RPI 1036

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