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Official data from INPI

SISTEMA DE TETO ADAPTADO PARA USO EM FORNOS TENDO TETO REMOVÍVEL EM DIFERENTES DIREÇÕES E SISTEMA DE TETO ADAPTADO PARA USO EM FORNOS DE ARCO ELÉTRICO DE INCLINAÇÃO

Prazo de SigiloInvention Patent

Application data

Number

PI8903531

Type

Invention Patent

Filing

07/18/1989

Publication

01/29/1991

Progress at the INPI

  1. Filing07/18/89
  2. Publication01/29/91
  3. Examination03/31/92
  4. Allowance07/27/93
  5. Grant05/31/94
  6. Expired12/22/09

The letters patent expired on 12/22/2009: 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: 11/21/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

South Carolina Systems, Inc.

US

Ucar Carbon Company Inc.

US

Union Carbide Chemicals and Plastics Company Inc.

US

U. C. (pessoa física)

US

Inventors

A. S. (pessoa física)

US

F. J. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

259.898 · 10/19/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

11/21/1989

RPI 996

Carta-patente expirada

#21.1

Patente extinta em 18/07/2004

12/22/2009

RPI 2033

Transferência deferida

#25.1

Transferido de: Ucar Carbon Company Inc.

04/06/2004

RPI 1735

Pedido de licença compulsória

#20.1

10/10/1995

RPI 1297

Concessão da patente

#16.1

05/31/1994

RPI 1226

9.1.3

10/26/1993

RPI 1195

Deferimento

#9.1

07/27/1993

RPI 1182

4.1.2

05/12/1992

RPI 1119

Solicitação de exame técnico

#4.1

03/31/1992

RPI 1113

Publicação do pedido de patente

#3.1

01/29/1991

RPI 1052

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