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

ANEL LIQUIDO DE DOIS ESTAGIOS

ConcedidaInvention Patent

Application data

Number

PI7909020

Type

Invention Patent

Filing

08/09/1979

Publication

-

Progress at the INPI

  1. Filing08/09/79
  2. Publication
  3. Examination06/28/83
  4. Allowance07/09/85
  5. Grant12/31/85
  6. Expired05/09/95

The letters patent expired on 05/09/1995: 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: 12/31/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NASH ENGINEERING CO [US]

Inventors

H. H. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/31/1985

RPI 793

Notificação para pagamento de retribuição

#13.1

11/12/1985

RPI 786

Deferimento

#9.1

07/09/1985

RPI 768

Conhecimento de parecer técnico

#7.1

01/24/1984

RPI 692

Solicitação de exame técnico

#4.1

06/28/1983

RPI 662

Carta-patente expirada

#21.1

05/09/1995

RPI 1275

Patent monitoring

Track this patent in real time.

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