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Official data from INPI

Processo de dessulfuração de um material em um cubilô com ignição a plasma

Prazo de SigiloInvention Patent

Application data

Number

PI8903199

Type

Invention Patent

Filing

06/29/1989

Publication

02/13/1990

Progress at the INPI

  1. Filing06/29/89
  2. Publication02/13/90
  3. Examination03/24/92
  4. Allowance12/03/96
  5. Grant05/26/98
  6. Expired12/26/12

The letters patent expired on 12/26/2012: 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: 10/17/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

W. C. (pessoa física)

US

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Inventors

R. T. (pessoa física)

US

S. D. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

212,851 · 06/29/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

10/17/1989

RPI 991

Carta-patente expirada

#21.1

Patente extinta em 29/06/2009

12/26/2012

RPI 2190

Concessão da patente

#16.1

05/26/1998

RPI 1431

Notificação para pagamento de retribuição

#13.1

05/13/1997

RPI 1380

Deferimento

#9.1

12/03/1996

RPI 1357

6.2

03/19/1996

RPI 1320

Solicitação de exame técnico

#4.1

03/24/1992

RPI 1112

Publicação do pedido de patente

#3.1

02/13/1990

RPI 1006

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