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Official data from INPI

PROCESSO CONTINUO EM FASE VAPOR PARA PREPARACAO DE ALQUIL MERCAPTAN

ConcedidaInvention Patent

Application data

Number

PI8103389

Type

Invention Patent

Filing

05/29/1981

Publication

08/24/1982

Progress at the INPI

  1. Filing05/29/81
  2. Publication08/24/82
  3. Examination08/28/84
  4. Allowance06/09/87
  5. Grant12/29/87
  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: 12/29/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Atochem North America, Inc.

US

See this company's full portfolio

Inventors

H. B. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/29/1987

RPI 897

Notificação para pagamento de retribuição

#13.1

09/29/1987

RPI 884

Deferimento

#9.1

06/09/1987

RPI 868

8.1

04/15/1986

RPI 808

Republicação - classificação IPC

#15.11

04/01/1986

RPI 806

Exigência - art. 36 da LPI

#6.1

04/16/1985

RPI 756

Solicitação de exame técnico

#4.1

08/28/1984

RPI 723

Publicação do pedido de patente

#3.1

08/24/1982

RPI 618

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: C07C 149/26; B01J 29/08; C07C 313/00; C07C 321/04; C07C 321/00.

03/20/2018

RPI 2463

Carta-patente expirada

#21.1

10/08/1996

RPI 1349

20.4

10/15/1991

RPI 1089

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