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Official data from INPI

PROCESSO PARA PREPARAR POLÍMEROS ELASTOMÉRICOS DE POLIURETANA OU POLIURETANA-URÉIA

Arquivada/ExtintaInvention PatentPCT · US1990003264

Application data

Number

PI9007432

Type

Invention Patent

Filing

06/08/1990

Publication

07/21/1992

PCT

US1990003264

Progress at the INPI

  1. Filing06/08/90
  2. Publication07/21/92
  3. Examination06/08/93
  4. Allowance09/26/00
  5. Grant01/23/01
  6. Expired01/15/13

The letters patent expired on 01/15/2013: 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: 01/15/2013. 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

P. R. (pessoa física)

US

T. B. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

367.280 · 06/16/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 23/01/2011

01/15/2013

RPI 2193

Concessão da patente

#16.1

01/23/2001

RPI 1568

Deferimento

#9.1

09/26/2000

RPI 1551

Exigência - art. 36 da LPI

#6.1

01/05/1999

RPI 1461

Solicitação de exame técnico

#4.1

06/08/1993

RPI 1175

Notificação de entrada na fase nacional - PCT

#1.3

07/21/1992

RPI 1129

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