(11) 98705-3426
TrademarkIQ iconTrademarkIQ
Back to search
Official data from INPI

APARELHO DIFERENCIAL PROPORCIONADOR DO TORQUE COM ESPACADOR CILINDRICO

ConcedidaInvention Patent

Application data

Number

PI8403692

Type

Invention Patent

Filing

02/13/1984

Publication

12/03/1985

Progress at the INPI

  1. Filing02/13/84
  2. Publication12/03/85
  3. Examination01/19/88
  4. Allowance10/04/88
  5. Grant09/26/89
  6. Expired08/19/08

The letters patent expired on 08/19/2008: 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: 09/26/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

TRACTECH INC [US]

Inventors

D. L. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/26/1989

RPI 988

Notificação para pagamento de retribuição

#13.1

01/24/1989

RPI 953

Deferimento

#9.1

10/04/1988

RPI 937

Solicitação de exame técnico

#4.1

01/19/1988

RPI 900

Publicação do pedido de patente

#3.1

12/03/1985

RPI 789

Pedido de patente depositado

#2.1

10/02/1984

RPI 728

Carta-patente expirada

#21.1

Patente extinta em 25/07/99

08/19/2008

RPI 1963

Patent monitoring

Track this patent in real time.

Receive alerts on INPI events, decisions, and expiry dates for your portfolio.