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Official data from INPI

PERMUTADOR DE CALOR DE SUPERFÍCIE RASPADA.

ConcedidaInvention Patent

Application data

Number

PI8101454

Type

Invention Patent

Filing

03/12/1981

Publication

-

Progress at the INPI

  1. Filing03/12/81
  2. Publication
  3. Examination11/08/83
  4. Allowance05/15/84
  5. Grant12/26/84
  6. Expired09/24/96

The letters patent expired on 09/24/1996: 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: 12/26/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Franrica Mfg. Inc.

Franrica MFG. INC.

US

Inventors

H. L. (pessoa física)

R. A. (pessoa física)

W. J. (pessoa física)

Technical data

IPC Classification

Priority claims

US

134.266 · 03/26/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/26/1984

RPI 740

Notificação para pagamento de retribuição

#13.1

09/04/1984

RPI 724

Deferimento

#9.1

05/15/1984

RPI 708

Solicitação de exame técnico

#4.1

11/08/1983

RPI 681

Carta-patente expirada

#21.1

09/24/1996

RPI 1347

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