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Official data from INPI

MONO-ALQUIL-ARIL-SULFONATO DE METAL ALCALINO TERROSO SUPERBASEADO E OLEO LUBRIFICANTE QUE O CONTEM

ConcedidaInvention Patent

Application data

Number

PI7804988

Type

Invention Patent

Filing

08/04/1977

Publication

-

Progress at the INPI

  1. Filing08/04/77
  2. Publication
  3. Examination
  4. Allowance01/10/84
  5. Grant07/31/84
  6. Expired12/14/93

The letters patent expired on 12/14/1993: 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: 07/31/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

EXXON RESEARCH ENGINEERING CO

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Inventors

L. R. (pessoa física)

T. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/31/1984

RPI 719

Notificação para pagamento de retribuição

#13.1

05/02/1984

RPI 706

Deferimento

#9.1

01/10/1984

RPI 690

Exigência - art. 36 da LPI

#6.1

04/12/1983

RPI 651

6.2

12/22/1981

RPI 583

Pedido de certificado de adição de invenção

#5.1

10/13/1981

RPI 573

Carta-patente expirada

#21.1

12/14/1993

RPI 1202

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