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Official data from INPI

SISTEMA DE AQUECIMENTO DIRETO.

ConcedidaInvention Patent

Application data

Number

PI8306298

Type

Invention Patent

Filing

11/17/1983

Publication

06/19/1984

Progress at the INPI

  1. Filing11/17/83
  2. Publication06/19/84
  3. Examination08/12/86
  4. Allowance12/29/87
  5. Grant07/26/88
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 07/26/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Combustion Engineering, Inc.

US

See this company's full portfolio

Inventors

M. L. (pessoa física)

Technical data

IPC Classification

Priority claims

US

442.557 · 11/18/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/26/1988

RPI 927

Notificação para pagamento de retribuição

#13.1

05/10/1988

RPI 916

Deferimento

#9.1

12/29/1987

RPI 897

Exigência - art. 36 da LPI

#6.1

06/16/1987

RPI 869

Solicitação de exame técnico

#4.1

08/12/1986

RPI 825

Publicação do pedido de patente

#3.1

06/19/1984

RPI 713

Pedido de patente depositado

#2.1

01/24/1984

RPI 692

Carta-patente expirada

#21.1

Patente extinta em 17/11/98

07/01/2008

RPI 1956

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