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Official data from INPI

APERFEICOAMENTOS EM AQUECEDORES ELETRICOS

Em AnáliseInvention Patent
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Application data

Number

PI7802309

Type

Invention Patent

Filing

04/13/1978

Publication

-
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Progress at the INPI

  1. Filing04/13/78
  2. Publication
  3. Examination
  4. Allowance12/01/81
  5. Grant05/31/83
  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: 02/12/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

C. E. (pessoa física)

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Inventors

Y. A. (pessoa física)

Technical data

IPC Classification

H05B 3/04H05B 3/06

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

201

02/12/1985

RPI 747

Pedido de licença voluntária

#17.1

07/24/1984

RPI 718

201

04/17/1984

RPI 704

Pedido de licença voluntária

#17.1

11/01/1983

RPI 680

Concessão da patente

#16.1

05/31/1983

RPI 658

Notificação para pagamento de retribuição

#13.1

01/18/1983

RPI 639

110

10/19/1982

RPI 626

Recurso

#12.1

04/27/1982

RPI 601

Recurso

#12.1

03/02/1982

RPI 593

Deferimento

#9.1

12/01/1981

RPI 580

Carta-patente expirada

#21.1

07/06/1993

RPI 1179

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