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Official data from INPI

PROCESSO PARA CONVERTER ECONOMICAMENTE OLEOS CARBOMETALICOS EM PRODUTOS MAIS LEVES

ConcedidaInvention Patent

Application data

Number

PI8007422

Type

Invention Patent

Filing

11/14/1979

Publication

-

Progress at the INPI

  1. Filing11/14/79
  2. Publication
  3. Examination09/21/82
  4. Allowance07/10/84
  5. Grant02/26/85
  6. Expired12/26/95

The letters patent expired on 12/26/1995: 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: 02/26/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Ashland Oil Inc.

US

See this company's full portfolio

Inventors

M. G. (pessoa física)

Technical data

IPC Classification

Priority claims

US

094.216 · 11/14/1979

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/26/1985

RPI 749

Notificação para pagamento de retribuição

#13.1

10/23/1984

RPI 731

Deferimento

#9.1

07/10/1984

RPI 716

Pedido de certificado de adição de invenção

#5.1

03/08/1983

RPI 646

Solicitação de exame técnico

#4.1

09/21/1982

RPI 622

Carta-patente expirada

#21.1

12/26/1995

RPI 1308

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