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Official data from INPI

CATALISADOR ISENTO DECROMO E PROCESSO PARA A DESIDROGENAÇÀO DE HIDROCARBONETOS USANDO O MESMO

Concessão AnuladaInvention Patent

Application data

Number

PI7800452

Type

Invention Patent

Filing

01/25/1978

Publication

-

Progress at the INPI

  1. Filing01/25/78
  2. Publication
  3. Examination
  4. Allowance11/01/83
  5. Grant04/24/84
  6. Expired07/20/93

The letters patent expired on 07/20/1993: 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: 07/24/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

See this company's full portfolio

Inventors

G. R. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

763180 · 01/27/1977

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

16.3

07/24/1984

RPI 718

Concessão da patente

#16.1

04/24/1984

RPI 705

Notificação para pagamento de retribuição

#13.1

02/14/1984

RPI 695

Deferimento

#9.1

11/01/1983

RPI 680

Republicação - classificação IPC

#15.11

01/11/1983

RPI 638

Exigência - art. 36 da LPI

#6.1

11/09/1982

RPI 629

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: B01J 23/76; C07B 3/00; C07C 11/16; C07C 15/46; C07C 67/00.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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