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Official data from INPI

ESPUMA DE COPOLIMERO DE ESTIRENO-ACIDO ACRILICO

ConcedidaInvention Patent
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Application data

Number

PI8103092

Type

Invention Patent

Filing

05/15/1981

Publication

12/21/1982
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Progress at the INPI

  1. Filing05/15/81
  2. Publication12/21/82
  3. Examination01/02/85
  4. Allowance06/21/88
  5. Grant04/25/89
  6. Terminated06/20/95

The patent was granted on 04/25/1989 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 04/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DOW CHEMICAL CO [US]

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Inventors

J. R. (pessoa física)

K. S. (pessoa física)

Technical data

IPC Classification

C08F 212/08

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/25/1989

RPI 966

Notificação para pagamento de retribuição

#13.1

10/25/1988

RPI 940

Deferimento

#9.1

06/21/1988

RPI 922

Exigência - art. 36 da LPI

#6.1

03/11/1986

RPI 803

Exigência - art. 36 da LPI

#6.1

07/23/1985

RPI 770

Solicitação de exame técnico

#4.1

01/02/1985

RPI 741

Publicação do pedido de patente

#3.1

12/21/1982

RPI 635

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: C08F 212/08; B29D 27/00.

03/27/2018

RPI 2464

Anuidade - prazo legal encerrado

#18.2

06/20/1995

RPI 1281

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