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Official data from INPI

solução de revestimento aquosa; processo para revestir uma superfície de alumínio; e concentrado aquoso.

Em AnáliseInvention Patent

Application data

Number

PI7702121

Type

Invention Patent

Filing

04/04/1977

Publication

-

Progress at the INPI

  1. Filing04/04/77
  2. Publication
  3. Examination
  4. Allowance03/02/82
  5. Grant
  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: 12/05/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Amchem Products Inc.,

US

See this company's full portfolio

Inventors

No inventors listed.

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

12/05/1989

RPI 998

20.7

12/05/1989

RPI 998

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. A classificação IPC anterior era C23F 7/00.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

07/27/1993

RPI 1182

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