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Official data from INPI

DISPOSITIVO PARA TRANFERÊNCIA DE CALOR POR MEIO DE TUBOS, BEM COMOTUBOS ADEQUADOS PARA ESTE FIM.

Concessão AnuladaInvention Patent

Application data

Number

PI7908566

Type

Invention Patent

Filing

12/29/1979

Publication

-

Progress at the INPI

  1. Filing12/29/79
  2. Publication
  3. Examination07/20/82
  4. Allowance11/16/83
  5. Grant04/24/84
  6. Expired05/09/95

The letters patent expired on 05/09/1995: 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: 07/24/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Akzo Nobel N.V.

NL

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Inventors

H. H. (pessoa física)

O. K. (pessoa física)

S. K. (pessoa física)

Technical data

IPC Classification

Priority claims

DE

P 28 56 642.9 · 12/29/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

16.4

07/24/1984

RPI 718

Concessão da patente

#16.1

04/24/1984

RPI 705

Notificação para pagamento de retribuição

#13.1

03/20/1984

RPI 700

Deferimento

#9.1

11/16/1983

RPI 682

Exigência - art. 36 da LPI

#6.1

03/15/1983

RPI 647

Solicitação de exame técnico

#4.1

07/20/1982

RPI 613

Carta-patente expirada

#21.1

05/09/1995

RPI 1275

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