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Official data from INPI

PROCESSO PARA A PREPARAÇÃO DE UMA ESPUMA POLIMÉRICA ALQUENIL AROMÁTICA E COMPOSIÇÃO DE ESPUMA

Em AnáliseInvention Patent

Application data

Number

PI8504498

Type

Invention Patent

Filing

09/16/1985

Publication

12/16/1986

Progress at the INPI

  1. Filing09/16/85
  2. Publication12/16/86
  3. Examination02/08/89
  4. Allowance03/12/91
  5. Grant10/29/91
  6. Terminated05/28/96

The patent was granted on 10/29/1991 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 02/08/1989. 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

K. S. (pessoa física)

US

R. H. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

722.485 · 04/12/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

02/08/1989

RPI 955

Publicação do pedido de patente

#3.1

12/16/1986

RPI 843

Pedido de patente depositado

#2.1

11/19/1985

RPI 787

Anuidade - prazo legal encerrado

#18.2

05/28/1996

RPI 1330

Concessão da patente

#16.1

10/29/1991

RPI 1091

Notificação para pagamento de retribuição

#13.1

06/25/1991

RPI 1073

Deferimento

#9.1

03/12/1991

RPI 1058

Exigência - art. 36 da LPI

#6.1

03/06/1990

RPI 1008

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