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Official data from INPI

PROCESSO DE SECAGEM E REMOÇÃO DE ÁCIDO RESIDUAL DE RESINAS DE POLÍMERO HALOGENADO

Arquivada/ExtintaInvention PatentPCT · US1987002222

Application data

Number

PI8707453

Type

Invention Patent

Filing

09/03/1987

Publication

12/06/1988

PCT

US1987002222

Progress at the INPI

  1. Filing09/03/87
  2. Publication12/06/88
  3. Examination03/06/90
  4. Allowance08/27/96
  5. Grant08/25/98
  6. Expired08/26/08

The letters patent expired on 08/26/2008: 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: 12/06/1988. 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

A. J. (pessoa física)

US

C. B. (pessoa física)

US

M. E. (pessoa física)

DE

Technical data

IPC Classification

Priority claims

US

903.635 · 09/04/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Notificação de entrada na fase nacional - PCT

#1.3

12/06/1988

RPI 946

Carta-patente expirada

#21.1

Patente extinta em 25/08/2008

08/26/2008

RPI 1964

Concessão da patente

#16.1

08/25/1998

RPI 1444

Notificação para pagamento de retribuição

#13.1

03/25/1997

RPI 1373

Deferimento

#9.1

08/27/1996

RPI 1343

Exigência - art. 36 da LPI

#6.1

12/05/1995

RPI 1305

Exigência - art. 36 da LPI

#6.1

11/30/1993

RPI 1200

Solicitação de exame técnico

#4.1

03/06/1990

RPI 1008

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