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Official data from INPI

PROCESSO PARA PREPARAR UM POLIÉTER TERMOPLÁSTICO E USO DE UM POLIÉTER TERMOPLÁSTICO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9100251

Type

Invention Patent

Filing

01/16/1991

Publication

10/22/1991

Progress at the INPI

  1. Filing01/16/91
  2. Publication10/22/91
  3. Examination01/04/94
  4. Allowance01/05/99
  5. Grant08/10/99
  6. Expired05/28/13

The letters patent expired on 05/28/2013: 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: 05/28/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Dow Chemical Company

US

See this company's full portfolio

Inventors

J. R. (pessoa física)

US

J. W. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

467.070 · 01/18/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 16/01/2011

05/28/2013

RPI 2212

Concessão da patente

#16.1

08/10/1999

RPI 1492

Deferimento

#9.1

01/05/1999

RPI 1461

Exigência - art. 36 da LPI

#6.1

06/23/1998

RPI 1435

Solicitação de exame técnico

#4.1

01/04/1994

RPI 1205

Publicação do pedido de patente

#3.1

10/22/1991

RPI 1090

Pedido de patente depositado

#2.1

08/06/1991

RPI 1079

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