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Official data from INPI

PERMUTADOR DE CALOR

Em AnáliseInvention Patent

Application data

Number

PI7706263

Type

Invention Patent

Filing

09/21/1976

Publication

-

Progress at the INPI

  1. Filing09/21/76
  2. Publication
  3. Examination
  4. Allowance
  5. Grant12/29/81
  6. Terminated08/28/90

The patent was granted on 12/29/1981 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 08/23/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SULZER AG

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Inventors

B. F. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

08/23/1983

RPI 670

Concessão da patente

#16.1

12/29/1981

RPI 584

Anuidade - prazo legal encerrado

#18.2

08/28/1990

RPI 1030

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