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Official data from INPI

USO DE POLIAMIDOAMINAS DE AMONIO HETEROCICLICO COMO DESEMULSIFICANTES

Em AnáliseInvention Patent

Application data

Number

PI8302213

Type

Invention Patent

Filing

04/26/1982

Publication

01/03/1984

Progress at the INPI

  1. Filing04/26/82
  2. Publication01/03/84
  3. Abandoned05/13/86
  4. Allowance
  5. Grant
  6. In force

The applicant withdrew the application. The case ended without a patent.

Talk to a specialist

Latest action published by the INPI: 06/16/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DOW CHEMICAL CO [US]

See this company's full portfolio

Inventors

C. R. (pessoa física)

W. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

10.1

06/16/1987

RPI 869

6.2

03/04/1987

RPI 854

Pedido de certificado de adição de invenção

#5.1

09/23/1986

RPI 831

Solicitação de exame técnico

#4.1

05/13/1986

RPI 812

Publicação do pedido de patente

#3.1

01/03/1984

RPI 689

Pedido de patente depositado

#2.1

06/14/1983

RPI 660

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