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Official data from INPI

APERFEIÇOAMENTO EM UM APARLHO OARA REFINAÇÃO DE METAL EM FUSÃO.

ConcedidaInvention Patent

Application data

Number

PI8103656

Type

Invention Patent

Filing

06/10/1981

Publication

03/02/1982

Progress at the INPI

  1. Filing06/10/81
  2. Publication03/02/82
  3. Examination04/17/84
  4. Allowance11/13/84
  5. Grant05/28/85
  6. Expired10/08/96

The letters patent expired on 10/08/1996: 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: 05/28/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Praxair Technology, Inc.

US

U. C. (pessoa física)

US

See this company's full portfolio

Inventors

P. J. (pessoa física)

Technical data

Priority claims

US

158.771 · 06/12/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/28/1985

RPI 762

Notificação para pagamento de retribuição

#13.1

03/26/1985

RPI 753

Deferimento

#9.1

11/13/1984

RPI 734

Solicitação de exame técnico

#4.1

04/17/1984

RPI 704

Publicação do pedido de patente

#3.1

03/02/1982

RPI 593

Carta-patente expirada

#21.1

10/08/1996

RPI 1349

Pedido de licença compulsória

#20.1

11/01/1994

RPI 1248

20.4

10/25/1994

RPI 1247

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