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Official data from INPI

PROCESSO PARA A PRODUCAO DE 1,2-DICLOROETANO

ConcedidaInvention Patent

Application data

Number

PI7701062

Type

Invention Patent

Filing

02/18/1977

Publication

-

Progress at the INPI

  1. Filing02/18/77
  2. Publication
  3. Examination
  4. Allowance03/02/82
  5. Grant10/26/82
  6. Expired07/27/93

The letters patent expired on 07/27/1993: 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: 10/26/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

STAUFFER CHEMICAL CO

See this company's full portfolio

Inventors

C. R. (pessoa física)

K. W. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/26/1982

RPI 627

Notificação para pagamento de retribuição

#13.1

06/22/1982

RPI 609

Deferimento

#9.1

03/02/1982

RPI 593

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: C07C 17/04; C07C 19/02.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

07/27/1993

RPI 1182

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