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Official data from INPI

PROCESSO PARA PREPARAR RESINAS DE POLIHIDROXIETER DE ELEVADO PESO MOLECULAR DE RESINAS EPOXI E BISFENOIS

ConcedidaInvention Patent

Application data

Number

PI7804816

Type

Invention Patent

Filing

07/27/1977

Publication

-

Progress at the INPI

  1. Filing07/27/77
  2. Publication
  3. Examination
  4. Allowance06/14/83
  5. Grant12/27/83
  6. Expired11/30/93

The letters patent expired on 11/30/1993: 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: 12/27/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DOW CHEMICAL CO

See this company's full portfolio

Inventors

C. J. (pessoa física)

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/27/1983

RPI 688

Notificação para pagamento de retribuição

#13.1

10/04/1983

RPI 676

Republicação - classificação IPC

#15.11

07/26/1983

RPI 666

Deferimento

#9.1

06/14/1983

RPI 660

Exigência - art. 36 da LPI

#6.1

02/01/1983

RPI 641

6.2

11/10/1981

RPI 577

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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