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Official data from INPI

COMPOSIÇÃO CONTENDO HIDROGÊNIO ATIVO, PROCESSO PARA PREPARAR UM POLÍMERO DE POLIURETANA MOLDADO E PROCESSO PARA PREPARAR UM COMPOSTO DE ALTA RESISTÊNCIA

Arquivada/ExtintaInvention PatentPCT · US1989002652

Application data

Number

PI8907502

Type

Invention Patent

Filing

06/16/1989

Publication

05/28/1991

PCT

US1989002652

Progress at the INPI

  1. Filing06/16/89
  2. Publication05/28/91
  3. Examination11/12/91
  4. Allowance02/12/97
  5. Grant01/21/98
  6. Expired12/26/12

The letters patent expired on 12/26/2012: 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: 12/26/2012. 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

N. L. (pessoa física)

US

W. P. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

210.958 · 06/24/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 16/06/2009

12/26/2012

RPI 2190

Concessão da patente

#16.1

01/21/1998

RPI 1413

Notificação para pagamento de retribuição

#13.1

05/13/1997

RPI 1380

Deferimento

#9.1

02/12/1997

RPI 1367

Exigência - art. 36 da LPI

#6.1

07/18/1995

RPI 1285

Solicitação de exame técnico

#4.1

11/12/1991

RPI 1093

Notificação de entrada na fase nacional - PCT

#1.3

05/28/1991

RPI 1069

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