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Official data from INPI

TROCADOR DE CALOR EVAPORATIVO DE CONTRA CORRENTE, E, PROCESSO PARA REMOVER O CALOR DOS FLUIDOS POR EVAPORAÇÃO.

ConcedidaInvention Patent

Application data

Number

PI7904221

Type

Invention Patent

Filing

07/04/1979

Publication

-

Progress at the INPI

  1. Filing07/04/79
  2. Publication
  3. Examination06/15/82
  4. Allowance02/08/83
  5. Grant09/27/83
  6. Expired04/18/95

The letters patent expired on 04/18/1995: 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: 09/27/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Batimore Aircoil Aompany, Inc

Inventors

S. E. (pessoa física)

Technical data

IPC Classification

Priority claims

US

922.454 · 07/06/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/27/1983

RPI 675

Notificação para pagamento de retribuição

#13.1

06/07/1983

RPI 659

Deferimento

#9.1

02/08/1983

RPI 642

Solicitação de exame técnico

#4.1

06/15/1982

RPI 608

Carta-patente expirada

#21.1

04/18/1995

RPI 1272

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