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Official data from INPI

ELEMENTO DE RESISTENCIA ELETRICA PARA AQUECIMENTO DE AR GASES E LIQUIDOS

ConcedidaUtility Model
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Application data

Number

MU6100634

Type

Utility Model

Filing

05/15/1981

Publication

-
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Progress at the INPI

  1. Filing05/15/81
  2. Publication
  3. Examination05/31/83
  4. Allowance05/13/86
  5. Grant12/30/86
  6. Expired11/22/94

The letters patent expired on 11/22/1994: 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: 12/30/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

KANTHAL BRASIL LTDA [BR]

Inventors

P. D. (pessoa física)

Technical data

IPC Classification

H05B 3/10

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/30/1986

RPI 845

Deferimento

#9.1

05/13/1986

RPI 812

Exigência - art. 36 da LPI

#6.1

12/24/1985

RPI 792

Exigência - art. 36 da LPI

#6.1

06/11/1985

RPI 764

Conhecimento de parecer técnico

#7.1

10/30/1984

RPI 732

Solicitação de exame técnico

#4.1

05/31/1983

RPI 658

Carta-patente expirada

#21.1

11/22/1994

RPI 1251

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