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Official data from INPI

PROCESSO DE FUNDIR UM ENVOLTÓRIO METÁLICO OCO PARA UM PERMUTADOR TÉRMICO DE REGENERAÇÃO

ConcedidaInvention Patent

Application data

Number

PI8201872

Type

Invention Patent

Filing

04/02/1982

Publication

03/08/1983

Progress at the INPI

  1. Filing04/02/82
  2. Publication03/08/83
  3. Examination01/29/85
  4. Allowance08/06/85
  5. Grant03/25/86
  6. Terminated10/16/90

The patent was granted on 03/25/1986 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 03/25/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Air Preheater Company, Inc

US

Inventors

L. M. (pessoa física)

US

R. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

246.214 · 04/02/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/25/1986

RPI 805

Notificação para pagamento de retribuição

#13.1

12/10/1985

RPI 790

Deferimento

#9.1

08/06/1985

RPI 772

Solicitação de exame técnico

#4.1

01/29/1985

RPI 745

Publicação do pedido de patente

#3.1

03/08/1983

RPI 646

Pedido de patente depositado

#2.1

05/25/1982

RPI 605

Anuidade - prazo legal encerrado

#18.2

10/16/1990

RPI 1037

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