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Official data from INPI

PROCESSO PARA FAZER UM ELASTÔMERO DE POLIURETANO BASEADO EM DIISOCIANATO DE P-TETRAMETIL-XILENO

Em ExigênciaInvention Patent

Application data

Number

PI8503572

Type

Invention Patent

Filing

07/29/1985

Publication

04/29/1986

Progress at the INPI

  1. Filing07/29/85
  2. Publication04/29/86
  3. Examination05/31/88
  4. Allowance01/08/91
  5. Grant08/27/91
  6. Terminated05/21/96

The patent was granted on 08/27/1991 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 08/22/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

American Cyanamid Company

US

See this company's full portfolio

Inventors

E. C. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

634.081 · 07/30/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Exigência - art. 36 da LPI

#6.1

08/22/1989

RPI 983

Solicitação de exame técnico

#4.1

05/31/1988

RPI 919

Publicação do pedido de patente

#3.1

04/29/1986

RPI 810

Pedido de patente depositado

#2.1

10/01/1985

RPI 780

Anuidade - prazo legal encerrado

#18.2

05/21/1996

RPI 1329

Concessão da patente

#16.1

08/27/1991

RPI 1082

Republicação - classificação IPC

#15.11

06/18/1991

RPI 1072

Notificação para pagamento de retribuição

#13.1

04/23/1991

RPI 1064

Deferimento

#9.1

01/08/1991

RPI 1049

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