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Official data from INPI

Processo para a preparação de um polímero à base de polímero solúvel em água.

Arquivada/ExtintaInvention Patent

Application data

Number

PI8906586

Type

Invention Patent

Filing

12/19/1989

Publication

09/04/1990

Progress at the INPI

  1. Filing12/19/89
  2. Publication09/04/90
  3. Examination12/26/90
  4. Allowance12/29/98
  5. Grant06/29/99
  6. Expired01/02/13

The letters patent expired on 01/02/2013: 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: 01/02/2013. 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. D. (pessoa física)

US

J. K. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

286,078 · 12/19/1988

US

428,704 · 10/30/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 19/12/2009

01/02/2013

RPI 2191

Concessão da patente

#16.1

06/29/1999

RPI 1486

Republicação - classificação IPC

#15.11

ALTERADA DE C08F 2/32

02/02/1999

RPI 1465

Deferimento

#9.1

12/29/1998

RPI 1460

Exigência - art. 36 da LPI

#6.1

08/18/1998

RPI 1443

Exigência - art. 36 da LPI

#6.1

07/18/1995

RPI 1285

Solicitação de exame técnico

#4.1

12/26/1990

RPI 1047

Publicação do pedido de patente

#3.1

09/04/1990

RPI 1031

Pedido de patente depositado

#2.1

04/10/1990

RPI 1013

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