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Official data from INPI

PROCESSO PARA A PREPARACAO DE POLIISOCIANATOS QUE APRESENTAM GRUPOS UREIA E/OU BIURETO EM FORMA DISPERSA OU DISSOLVIDA E DISPERSOES ESTAVEIS DE POLIISOCIANATOS EM DIISOCIANATOS

ConcedidaInvention Patent

Application data

Number

PI7900429

Type

Invention Patent

Filing

01/25/1978

Publication

-

Progress at the INPI

  1. Filing01/25/78
  2. Publication
  3. Examination10/06/81
  4. Allowance10/23/84
  5. Grant05/28/85
  6. Expired05/31/94

The letters patent expired on 05/31/1994: 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: 05/28/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BAYER AG

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Inventors

H. H. (pessoa física)

S. E. (pessoa física)

Z. P. (pessoa física)

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/28/1985

RPI 762

Notificação para pagamento de retribuição

#13.1

03/05/1985

RPI 750

Deferimento

#9.1

10/23/1984

RPI 731

Exigência - art. 36 da LPI

#6.1

01/17/1984

RPI 691

6.2

05/04/1982

RPI 602

Solicitação de exame técnico

#4.1

10/06/1981

RPI 572

Carta-patente expirada

#21.1

05/31/1994

RPI 1226

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