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Official data from INPI

PROCESSO PARA RECUPERAÇÃO DE METAL

Em AnáliseInvention PatentPCT · US1986000350

Application data

Number

PI8606705

Type

Invention Patent

Filing

02/18/1986

Publication

08/11/1987

PCT

US1986000350

Progress at the INPI

  1. Filing02/18/86
  2. Publication08/11/87
  3. Examination11/24/87
  4. Allowance11/16/93
  5. Grant06/28/94
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 11/24/1987. 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

E. S. (pessoa física)

US

R. K. (pessoa física)

US

R. H. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

740091 · 05/31/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

11/24/1987

RPI 892

Notificação de entrada na fase nacional - PCT

#1.3

08/11/1987

RPI 877

Carta-patente expirada

#21.1

Patente extinta em 18/02/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

06/28/1994

RPI 1230

Notificação para pagamento de retribuição

#13.1

03/22/1994

RPI 1216

Deferimento

#9.1

11/16/1993

RPI 1198

Exigência - art. 36 da LPI

#6.1

05/04/1993

RPI 1170

Exigência - art. 36 da LPI

#6.1

10/27/1992

RPI 1143

Conhecimento de parecer técnico

#7.1

11/26/1991

RPI 1095

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