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Official data from INPI

PERMUTADOR DE CALOR.

ConcedidaInvention Patent

Application data

Number

PI8307581

Type

Invention Patent

Filing

08/22/1983

Publication

10/23/1984

Progress at the INPI

  1. Filing08/22/83
  2. Publication10/23/84
  3. Examination06/17/86
  4. Allowance11/03/87
  5. Grant07/26/88
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 07/26/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Caterpillar Tractor Co.

US

See this company's full portfolio

Inventors

E. B. (pessoa física)

Technical data

IPC Classification

No IPC classification.

Priority claims

US

443.811 · 11/22/1982

US

PCT/83/01292 · 08/22/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/26/1988

RPI 927

14.1

04/12/1988

RPI 912

Notificação para pagamento de retribuição

#13.1

03/01/1988

RPI 906

Deferimento

#9.1

11/03/1987

RPI 889

Exigência - art. 36 da LPI

#6.1

03/04/1987

RPI 854

Solicitação de exame técnico

#4.1

06/17/1986

RPI 817

Notificação de entrada na fase nacional - PCT

#1.3

10/23/1984

RPI 731

Carta-patente expirada

#21.1

Patente extinta em 22/08/98

07/01/2008

RPI 1956

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