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Official data from INPI

PROCESSO E APARELHO PARA TRATAMENTO A CALOR DE CORRENTES DE ELOS

Em AnáliseInvention Patent
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Application data

Number

PI7703909

Type

Invention Patent

Filing

06/16/1976

Publication

-
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Progress at the INPI

  1. Filing06/16/76
  2. Publication
  3. Examination
  4. Allowance
  5. Grant07/27/82
  6. Expired07/06/93

The letters patent expired on 07/06/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 06/11/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

K. K. (pessoa física)

Inventors

K. N. (pessoa física)

Technical data

IPC Classification

C21D 9/40

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.11

06/11/1985

RPI 764

20.10

05/28/1985

RPI 762

20.7

02/26/1985

RPI 749

20.10

02/20/1985

RPI 748

20.4

12/18/1984

RPI 739

Concessão da patente

#16.1

07/27/1982

RPI 614

Notificação para pagamento de retribuição

#13.1

12/22/1981

RPI 583

Carta-patente expirada

#21.1

07/06/1993

RPI 1179

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