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Official data from INPI

PROCESSO PARA A PREPARAÇÃO DE UM POLÍMERO DE ACRILAMIDA CONTENDO GRUPOS HIDROXÂMICOS

Prazo de SigiloInvention Patent

Application data

Number

PI8900267

Type

Invention Patent

Filing

01/23/1989

Publication

03/01/1990

Progress at the INPI

  1. Filing01/23/89
  2. Publication03/01/90
  3. Examination05/19/92
  4. Allowance12/10/96
  5. Grant08/26/97
  6. Expired05/21/13

The letters patent expired on 05/21/2013: 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: 03/07/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

American Cyanamid Company

US

See this company's full portfolio

Inventors

D. S. (pessoa física)

US

M. L. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

197,884 · 05/24/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

03/07/1989

RPI 959

Carta-patente expirada

#21.1

Patente extinta em 23/01/2009

05/21/2013

RPI 2211

Concessão da patente

#16.1

08/26/1997

RPI 1395

Deferimento

#9.1

12/10/1996

RPI 1358

Exigência - art. 36 da LPI

#6.1

06/20/1995

RPI 1281

Solicitação de exame técnico

#4.1

05/19/1992

RPI 1120

Publicação do pedido de patente

#3.1

03/01/1990

RPI 1007

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