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Official data from INPI

PROCESSO PARA SEPARAÇÃO DE ISOCIANATO DE METILA

Em AnáliseInvention Patent

Application data

Number

PI8600040

Type

Invention Patent

Filing

01/07/1986

Publication

09/01/1987

Progress at the INPI

  1. Filing01/07/86
  2. Publication09/01/87
  3. Examination10/10/89
  4. Allowance06/25/91
  5. Grant12/31/91
  6. Terminated06/18/96

The patent was granted on 12/31/1991 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: 10/10/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DU PONT [US]

See this company's full portfolio

Inventors

G. H. (pessoa física)

US

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/10/1989

RPI 990

Publicação do pedido de patente

#3.1

09/01/1987

RPI 880

Pedido de patente depositado

#2.1

04/15/1986

RPI 808

Anuidade - prazo legal encerrado

#18.2

06/18/1996

RPI 1333

Republicação - classificação IPC

#15.11

05/12/1992

RPI 1119

Republicação - classificação IPC

#15.11

03/17/1992

RPI 1111

Concessão da patente

#16.1

12/31/1991

RPI 1100

Republicação - classificação IPC

#15.11

11/12/1991

RPI 1093

Notificação para pagamento de retribuição

#13.1

10/22/1991

RPI 1090

Deferimento

#9.1

06/25/1991

RPI 1073

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