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Official data from INPI

PROCESSO PARA A PREPARAÇÃO DE UMA ESPIRO (INDOLINO) BENZOXAZINA E ELEMENTO ÓTICO FOTOCRÔMICO TRANSPARENTE

Arquivada/ExtintaInvention PatentPCT · US1987002475

Application data

Number

PI8707841

Type

Invention Patent

Filing

09/28/1987

Publication

10/03/1989

PCT

US1987002475

Progress at the INPI

  1. Filing09/28/87
  2. Publication10/03/89
  3. Examination02/01/90
  4. Allowance03/19/96
  5. Grant12/31/96
  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: 10/03/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

PPG Industries, Inc.

US

See this company's full portfolio

Inventors

C. C. (pessoa física)

US

W. K. (pessoa física)

US

Technical data

Priority claims

US

074.692 · 07/23/1987

US

912.718 · 09/26/1986

US

929.936 · 11/12/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Notificação de entrada na fase nacional - PCT

#1.3

10/03/1989

RPI 989

Carta-patente expirada

#21.1

Patente extinta em 28/09/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

12/31/1996

RPI 1361

Deferimento

#9.1

03/19/1996

RPI 1320

Exigência - art. 36 da LPI

#6.1

06/20/1995

RPI 1281

Solicitação de exame técnico

#4.1

02/01/1990

RPI 1004

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