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Official data from INPI

PROCESSO DE PURIFICACAO DO ACRILONITRILO

ConcedidaInvention Patent

Application data

Number

PI8003733

Type

Invention Patent

Filing

06/16/1980

Publication

-

Progress at the INPI

  1. Filing06/16/80
  2. Publication
  3. Examination07/12/83
  4. Allowance03/11/86
  5. Grant10/29/86
  6. Expired09/12/95

The letters patent expired on 09/12/1995: 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: 10/29/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Standard Oil Company

US

See this company's full portfolio

Inventors

L. N. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/29/1986

RPI 836

Notificação para pagamento de retribuição

#13.1

07/01/1986

RPI 819

Deferimento

#9.1

03/11/1986

RPI 803

Exigência - art. 36 da LPI

#6.1

05/21/1985

RPI 761

Exigência - art. 36 da LPI

#6.1

02/14/1984

RPI 695

Solicitação de exame técnico

#4.1

07/12/1983

RPI 664

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: C07C 121/32; C07F 3/00; C08F 120/44; C07C 253/00; C08F 120/00.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

09/12/1995

RPI 1293

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