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Official data from INPI

APERFEICOAMENTOS EM PERMUTADOR DE CALOR DE FLUXO PARALELO DE LIQUIDO-GAS COM RECIRCULACAO DO LIQUIDO E EM PROCESSO DE CALOR DE UM LIQUIDO EM PERMUTADOR DE CALOR DE GAS-LIQUIDO DE FLUXO PARALELO

Em AnáliseInvention Patent

Application data

Number

PI7701305

Type

Invention Patent

Filing

03/05/1976

Publication

-

Progress at the INPI

  1. Filing03/05/76
  2. Publication
  3. Examination
  4. Allowance07/13/82
  5. Grant01/25/83
  6. Terminated12/08/87

The patent was granted on 01/25/1983 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: 12/08/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BALTIMORE AIRCOIL CO INC

Inventors

H. R. (pessoa física)

S. E. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

12/08/1987

RPI 894

Concessão da patente

#16.1

01/25/1983

RPI 640

Notificação para pagamento de retribuição

#13.1

11/30/1982

RPI 632

Deferimento

#9.1

07/13/1982

RPI 612

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