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

APERFEICOAMENTO EM PROCESSO PARA SEPARACAO DE AR E APERFEICOAMENTO EM APARELHO DE VARIACAO ADIABATICA DA PRESSAO PARA SEPARACAO DE AR

Em AnáliseInvention Patent

Application data

Number

PI7507051

Type

Invention Patent

Filing

06/20/1975

Publication

-

Progress at the INPI

  1. Filing06/20/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant11/10/81
  6. Expired08/10/93

The letters patent expired on 08/10/1993: 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: 06/26/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

UNION CARBIDE CORP

See this company's full portfolio

Inventors

C. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

06/26/1984

RPI 714

Concessão da patente

#16.1

11/10/1981

RPI 577

Carta-patente expirada

#21.1

08/10/1993

RPI 1184

Patent monitoring

Track this patent in real time.

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