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Official data from INPI

PROCESSO PARA TRATAR ARGILA DE ALVEJAMENTO EXAURIDA

ConcedidaInvention Patent

Application data

Number

PI7806374

Type

Invention Patent

Filing

09/29/1977

Publication

-

Progress at the INPI

  1. Filing09/29/77
  2. Publication
  3. Examination
  4. Allowance07/08/86
  5. Grant02/03/87
  6. Expired05/03/94

The letters patent expired on 05/03/1994: 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: 02/03/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CPC INTERNATIONAL INC

See this company's full portfolio

Inventors

P. P. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/03/1987

RPI 850

Notificação para pagamento de retribuição

#13.1

11/04/1986

RPI 837

Deferimento

#9.1

07/08/1986

RPI 820

Conhecimento de parecer técnico

#7.1

04/12/1983

RPI 651

6.2

12/22/1981

RPI 583

Pedido de certificado de adição de invenção

#5.1

10/13/1981

RPI 573

Carta-patente expirada

#21.1

05/03/1994

RPI 1222

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