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Official data from INPI

PROCESSO PARA CONCENTRAR VALORES MINERAIS CONTENDO FERRO

Arquivada/ExtintaInvention PatentPCT · US1988003945

Application data

Number

PI8807752

Type

Invention Patent

Filing

11/04/1988

Publication

08/07/1990

PCT

US1988003945

Progress at the INPI

  1. Filing11/04/88
  2. Publication08/07/90
  3. Examination08/27/91
  4. Allowance05/27/97
  5. Grant01/21/98
  6. Expired12/18/12

The letters patent expired on 12/18/2012: 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: 12/18/2012. 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

R. K. (pessoa física)

US

R. H. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

116.757 · 11/04/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 04/11/2008

12/18/2012

RPI 2189

Concessão da patente

#16.1

01/21/1998

RPI 1413

Deferimento

#9.1

05/27/1997

RPI 1382

Exigência - art. 36 da LPI

#6.1

10/01/1996

RPI 1348

Exigência - art. 36 da LPI

#6.1

12/19/1995

RPI 1307

Solicitação de exame técnico

#4.1

08/27/1991

RPI 1082

Notificação de entrada na fase nacional - PCT

#1.3

08/07/1990

RPI 1027

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