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Official data from INPI

MÉTODO DE PREPARAÇÃO DE UMA RESINA EPÓXI AVANÇADA RAMIFICADA USANDO AGENTE DE RAMIFICAÇÃO DE LÍTIO OU CÉSIO

Em AnáliseInvention Patent

Application data

Number

PI8506891

Type

Invention Patent

Filing

08/14/1985

Publication

12/09/1986

Progress at the INPI

  1. Filing08/14/85
  2. Publication12/09/86
  3. Examination03/01/88
  4. Allowance01/29/91
  5. Grant09/24/91
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 03/01/1988. 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. H. (pessoa física)

DE

R. A. (pessoa física)

FR

Technical data

IPC Classification

Priority claims

GB

8420817 · 08/16/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

03/01/1988

RPI 906

Notificação de entrada na fase nacional - PCT

#1.3

12/09/1986

RPI 842

Carta-patente expirada

#21.1

Patente extinta em 14/08/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

09/24/1991

RPI 1086

Notificação para pagamento de retribuição

#13.1

05/14/1991

RPI 1067

Deferimento

#9.1

01/29/1991

RPI 1052

Exigência - art. 36 da LPI

#6.1

07/31/1990

RPI 1026

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