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Official data from INPI

PROCESSO PARA A PREPARACAO DE SOLUCOES AQUOSAS OU DISPERSOES DE POLIURETANAS,SOLUCOES OU DISPERSOES OBTENIVEIS DE ACORDO COM ESTE PROCESSO,BEM COMO SUA APLICACAO PARA A PRODUCAO DE REVESTIMENTOS,LACAS OU PELICULAS

ConcedidaInvention Patent

Application data

Number

PI7901579

Type

Invention Patent

Filing

03/15/1978

Publication

-

Progress at the INPI

  1. Filing03/15/78
  2. Publication
  3. Examination12/15/81
  4. Allowance09/25/84
  5. Grant03/26/85
  6. Expired06/21/94

The letters patent expired on 06/21/1994: 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: 03/26/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BAYER AG

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Inventors

G. J. (pessoa física)

N. K. (pessoa física)

P. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/26/1985

RPI 753

Notificação para pagamento de retribuição

#13.1

01/29/1985

RPI 745

Deferimento

#9.1

09/25/1984

RPI 727

Exigência - art. 36 da LPI

#6.1

01/31/1984

RPI 693

6.2

06/22/1982

RPI 609

Solicitação de exame técnico

#4.1

12/15/1981

RPI 582

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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