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Official data from INPI

PERMUTADOR DE CALOR DE TUBOS INCLINADOS.

Em AnáliseInvention Patent

Application data

Number

PI7808759

Type

Invention Patent

Filing

11/24/1978

Publication

-

Progress at the INPI

  1. Filing11/24/78
  2. Publication
  3. Examination09/28/82
  4. Allowance05/31/83
  5. Grant01/31/84
  6. Expired05/31/94

The letters patent expired on 05/31/1994: 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: 05/31/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Caterpillar Tractor Co.

US

See this company's full portfolio

Inventors

H. D. (pessoa física)

M. C. (pessoa física)

Technical data

IPC Classification

Priority claims

US

78/00174 · 11/24/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

05/31/1988

RPI 919

20.10

05/31/1988

RPI 919

Licença compulsória (variante)

#20.2

04/12/1988

RPI 912

Concessão da patente

#16.1

01/31/1984

RPI 693

Notificação para pagamento de retribuição

#13.1

09/27/1983

RPI 675

Deferimento

#9.1

05/31/1983

RPI 658

Solicitação de exame técnico

#4.1

09/28/1982

RPI 623

Carta-patente expirada

#21.1

05/31/1994

RPI 1226

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