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Official data from INPI

AQUECEDOR ELÉTRICO DE ESPIRAS DE LÂMINAS METÁLICAS.

ConcedidaInvention Patent

Application data

Number

PI8304669

Type

Invention Patent

Filing

08/29/1983

Publication

11/08/1983

Progress at the INPI

  1. Filing08/29/83
  2. Publication11/08/83
  3. Examination01/24/84
  4. Allowance02/04/86
  5. Grant09/30/86
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 09/30/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Coelma Construções Eletricas Ltda

SP, BR

Inventors

G. D. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/30/1986

RPI 832

Notificação para pagamento de retribuição

#13.1

06/24/1986

RPI 818

Deferimento

#9.1

02/04/1986

RPI 798

Republicação - classificação IPC

#15.11

10/01/1985

RPI 780

Exigência - art. 36 da LPI

#6.1

09/24/1985

RPI 779

Solicitação de exame técnico

#4.1

01/24/1984

RPI 692

Publicação antecipada

#3.2

11/08/1983

RPI 681

Pedido de patente depositado

#2.1

11/01/1983

RPI 680

Carta-patente expirada

#21.1

Patente extinta em 29/08/98

07/01/2008

RPI 1956

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