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Official data from INPI

COMPOSIÇÃO COPOLÍMERA ELASTOMÉRICA, RESPECTIVO PROCESSO DE PRODUÇÃO E PNEUMÁTICO.

ConcedidaInvention Patent

Application data

Number

PI8101308

Type

Invention Patent

Filing

03/06/1981

Publication

-

Progress at the INPI

  1. Filing03/06/81
  2. Publication
  3. Examination12/15/81
  4. Allowance04/09/85
  5. Grant10/29/85
  6. Expired09/24/96

The letters patent expired on 09/24/1996: 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: 10/29/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Dunlop Limited

GB

Shell Internationale Research Maatschappij B.V

NL

See this company's full portfolio

Inventors

B. R. (pessoa física)

B. R. (pessoa física)

G. E. (pessoa física)

Technical data

Priority claims

GB

8007860 · 03/07/1980

GB

8007861 · 03/07/1980

GB

8038405 · 11/29/1980

GB

8038406 · 11/29/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/29/1985

RPI 784

Notificação para pagamento de retribuição

#13.1

07/30/1985

RPI 771

Deferimento

#9.1

04/09/1985

RPI 755

Exigência - art. 36 da LPI

#6.1

07/03/1984

RPI 715

14.1

11/01/1983

RPI 680

Solicitação de exame técnico

#4.1

12/15/1981

RPI 582

Carta-patente expirada

#21.1

09/24/1996

RPI 1347

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