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Official data from INPI

MÉTODO E APARELHO PARA CONCENTRAR SÓLIDOS EM UMA LAMA AQUOSA DE ARGILA MEDIANTE EVAPORAÇÃO DE ÁGUA DE LAMA

Arquivada/ExtintaInvention PatentPCT · US1989005347

Application data

Number

PI8907285

Type

Invention Patent

Filing

11/30/1989

Publication

03/12/1991

PCT

US1989005347

Progress at the INPI

  1. Filing11/30/89
  2. Publication03/12/91
  3. Examination06/08/93
  4. Allowance11/29/94
  5. Grant07/25/95
  6. Expired12/29/09

The letters patent expired on 12/29/2009: 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: 12/29/2009. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Georgia Kaolin Company, Inc

US

See this company's full portfolio

Inventors

W. T. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

290.135 · 12/27/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 30/11/2004

12/29/2009

RPI 2034

Concessão da patente

#16.1

07/25/1995

RPI 1286

Notificação para pagamento de retribuição

#13.1

04/04/1995

RPI 1270

Deferimento

#9.1

11/29/1994

RPI 1252

Exigência - art. 36 da LPI

#6.1

06/07/1994

RPI 1227

Solicitação de exame técnico

#4.1

06/08/1993

RPI 1175

Notificação de entrada na fase nacional - PCT

#1.3

03/12/1991

RPI 1058

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