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Official data from INPI

COMPOSIÇÕES DE LIBERAÇÃO PROLONGADA COMPREENDENDO ÉTERES DE HIDROXIPROPIL CELULOSE

Em AnáliseInvention Patent

Application data

Number

PI8606003

Type

Invention Patent

Filing

11/18/1986

Publication

09/15/1987

Progress at the INPI

Under appeal
  1. Filing11/18/86
  2. Publication09/15/87
  3. Examination10/24/89
  4. Refused04/20/93
  5. Grant
  6. In force

The application was refused by the INPI on 04/20/1993. The invention was never patented.

Talk to a specialist

Latest action published by the INPI: 10/24/1989. 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

D. A. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

799,044 · 11/18/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/24/1989

RPI 992

Publicação do pedido de patente

#3.1

09/15/1987

RPI 882

Pedido de patente depositado

#2.1

04/14/1987

RPI 860

Indeferimento

#9.2

04/20/1993

RPI 1168

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