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Official data from INPI

SISTEMA DE DESCARGA DE MATERIAL DE CORREIA TRANSPORTADORA

Em AnáliseInvention Patent

Application data

Number

PI7800835

Type

Invention Patent

Filing

02/10/1978

Publication

-

Progress at the INPI

  1. Filing02/10/78
  2. Publication
  3. Examination
  4. Allowance05/22/84
  5. Grant10/30/84
  6. Expired07/20/93

The letters patent expired on 07/20/1993: 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: 06/24/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DRESSER IND COM LTD

Inventors

F. D. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

06/24/1986

RPI 818

Concessão da patente

#16.1

10/30/1984

RPI 732

Notificação para pagamento de retribuição

#13.1

09/04/1984

RPI 724

Deferimento

#9.1

05/22/1984

RPI 709

Exigência - art. 36 da LPI

#6.1

11/22/1983

RPI 683

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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