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Official data from INPI

COMPOSIÇÃO DE POLÍMERO DE TEREFTALATO DE ETILENO APROPRIADA PARA PREPARAÇÃO DE UMA FOLHA CRISTALINA QUE CRISTALIZA RAPIDAMENTE, MAS NÃO INSTANTANEAMENTE, À TEMPERATURA DE TERMO-FORMAÇÃO, ADEQUADA PARA FABRICAR TRAVESSAS QUE PODEM IR AO FORNO.

PublicadaInvention Patent

Application data

Number

PI8704276

Type

Invention Patent

Filing

08/19/1987

Publication

07/19/1988

Progress at the INPI

  1. Filing08/19/87
  2. Publication07/19/88
  3. Examination11/06/90
  4. Allowance09/08/93
  5. Grant04/26/94
  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: 07/19/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ROHM & HAAS [US]

See this company's full portfolio

Inventors

W. C. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

938.224 · 12/05/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

07/19/1988

RPI 926

Pedido de patente depositado

#2.1

11/17/1987

RPI 891

Carta-patente expirada

#21.1

Patente extinta em 19/08/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

04/26/1994

RPI 1221

Deferimento

#9.1

09/08/1993

RPI 1188

Exigência - art. 36 da LPI

#6.1

06/02/1992

RPI 1122

Solicitação de exame técnico

#4.1

11/06/1990

RPI 1040

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