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Official data from INPI

PROCESSO PARA PREPARACAO DE UM ADITIVO PARA ESTABILIDADE TERMICA DE METIL-POLISSILOXANA,E PROCESSO PARA PREPARACAO DE UM FLUIDO DE METIL-POLISSILOXANA TENDO RESISTENCIA MELHORADA AO REARRANJO TERMICO DE SILOXANA

Concessão AnuladaInvention Patent

Application data

Number

PI7802421

Type

Invention Patent

Filing

08/02/1977

Publication

-

Progress at the INPI

  1. Filing08/02/77
  2. Publication
  3. Examination
  4. Allowance03/01/83
  5. Grant08/30/83
  6. Expired07/06/93

The letters patent expired on 07/06/1993: 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: 10/25/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

D. C. (pessoa física)

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Inventors

H. R. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

16.3

10/25/1983

RPI 679

Concessão da patente

#16.1

08/30/1983

RPI 671

Notificação para pagamento de retribuição

#13.1

06/21/1983

RPI 661

Deferimento

#9.1

03/01/1983

RPI 645

Republicação - classificação IPC

#15.11

02/22/1983

RPI 644

Carta-patente expirada

#21.1

07/06/1993

RPI 1179

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