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Official data from INPI

PROCESSO DE PREPARAÇÃO DE RESINAS EPÓXI MODIFICADAS

Em ExigênciaInvention Patent

Application data

Number

PI8307397

Type

Invention Patent

Filing

06/03/1983

Publication

05/08/1984

Progress at the INPI

  1. Filing06/03/83
  2. Publication05/08/84
  3. Examination03/04/86
  4. Allowance03/13/90
  5. Grant11/27/90
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 01/31/1989. 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

G. G. (pessoa física)

US

K. O. (pessoa física)

US

R. H. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

393.969 · 06/10/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Exigência - art. 36 da LPI

#6.1

01/31/1989

RPI 954

Exigência - art. 36 da LPI

#6.1

06/21/1988

RPI 922

Solicitação de exame técnico

#4.1

03/04/1986

RPI 802

Notificação de entrada na fase nacional - PCT

#1.3

05/08/1984

RPI 707

Carta-patente expirada

#21.1

Patente extinta em 03/06/98

07/01/2008

RPI 1956

Concessão da patente

#16.1

11/27/1990

RPI 1043

Notificação para pagamento de retribuição

#13.1

07/24/1990

RPI 1025

Deferimento

#9.1

03/13/1990

RPI 1009

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