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Official data from INPI

SUPERFICIE TERMICAMENTE CONDUTIVA E PROCESSO DE FORMACAO DE UM TUBO TROCADOR DE CALOR

ConcedidaInvention Patent

Application data

Number

PI7804497

Type

Invention Patent

Filing

07/13/1977

Publication

-

Progress at the INPI

  1. Filing07/13/77
  2. Publication
  3. Examination
  4. Allowance08/03/82
  5. Grant04/26/83
  6. Expired11/30/93

The letters patent expired on 11/30/1993: 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: 04/26/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CARRIER CORP

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Inventors

B. W. (pessoa física)

K. A. (pessoa física)

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/26/1983

RPI 653

Notificação para pagamento de retribuição

#13.1

12/14/1982

RPI 634

Deferimento

#9.1

08/03/1982

RPI 615

Exigência - art. 36 da LPI

#6.1

12/22/1981

RPI 583

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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