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Official data from INPI

SEM TITULO

ConcedidaInvention Patent

Application data

Number

PI8501399

Type

Invention Patent

Filing

03/27/1985

Publication

11/26/1985

Progress at the INPI

  1. Filing03/27/85
  2. Publication11/26/85
  3. Examination08/19/86
  4. Allowance04/12/88
  5. Grant10/25/88
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 10/25/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Air Preheater Company, Inc

US

Inventors

S. M. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/25/1988

RPI 940

Notificação para pagamento de retribuição

#13.1

07/26/1988

RPI 927

Deferimento

#9.1

04/12/1988

RPI 912

Solicitação de exame técnico

#4.1

08/19/1986

RPI 826

Publicação do pedido de patente

#3.1

11/26/1985

RPI 788

Pedido de patente depositado

#2.1

06/18/1985

RPI 765

Carta-patente expirada

#21.1

Patente extinta em 27/03/2000

07/15/2008

RPI 1958

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