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Official data from INPI

PROCESSO PARA PREPARAÇÃO DE ANIDRIDO FTÁLICO SUBSTITUIDO E PROCESSO PARA PREPARAÇÃO DE ANIDRIDO 4-METILFTÁLICO

Em AnáliseInvention Patent

Application data

Number

PI8501518

Type

Invention Patent

Filing

04/01/1985

Publication

11/26/1985

Progress at the INPI

  1. Filing04/01/85
  2. Publication11/26/85
  3. Examination01/19/88
  4. Allowance09/25/90
  5. Grant05/28/91
  6. Terminated05/21/96

The patent was granted on 05/28/1991 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: 01/19/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Stauffer Chemical Company

US

See this company's full portfolio

Inventors

J. T. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

600.247 · 04/16/1984

US

600.248 · 04/16/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

01/19/1988

RPI 900

Publicação do pedido de patente

#3.1

11/26/1985

RPI 788

Pedido de patente depositado

#2.1

06/25/1985

RPI 766

Anuidade - prazo legal encerrado

#18.2

05/21/1996

RPI 1329

Concessão da patente

#16.1

05/28/1991

RPI 1069

Notificação para pagamento de retribuição

#13.1

01/08/1991

RPI 1049

Deferimento

#9.1

09/25/1990

RPI 1034

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