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Official data from INPI

PROCESSO PARA PREPARAR VIDRO DE MODO A CONTROLAR O ESTADO DE VALÊNCIA FINAL DE ÍONS MULTIVALENTES CONTIDOS NO VIDRO ; E PROCESSO PARA FUNDIR E PURIFICAR VIDROS

Arquivada/ExtintaInvention Patent

Application data

Number

PI9102428

Type

Invention Patent

Filing

06/12/1991

Publication

01/14/1992

Progress at the INPI

  1. Filing06/12/91
  2. Publication01/14/92
  3. Examination05/25/93
  4. Allowance02/15/00
  5. Grant07/11/00
  6. Expired06/04/13

The letters patent expired on 06/04/2013: 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: 06/04/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

PPG Industries, Inc

US

PPG Industries Ohio, INC

US

See this company's full portfolio

Inventors

L. K. (pessoa física)

US

W. H. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

543.006 · 06/25/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 12/06/2011

06/04/2013

RPI 2213

Transferência deferida

#25.1

Transferido de: PPG Industries, Inc.

07/05/2005

RPI 1800

Concessão da patente

#16.1

07/11/2000

RPI 1540

Deferimento

#9.1

02/15/2000

RPI 1519

Exigência - art. 36 da LPI

#6.1

08/24/1999

RPI 1494

Solicitação de exame técnico

#4.1

05/25/1993

RPI 1173

Publicação do pedido de patente

#3.1

01/14/1992

RPI 1102

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