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Official data from INPI

PROCESSO PARA FORMAR UMA SUPERFICIE MICROESTRUTURADA E ARTIGO QUE TEM UMA SUPERFICIE MICROESTRUTURADA

ConcedidaInvention Patent

Application data

Number

PI7907066

Type

Invention Patent

Filing

11/01/1978

Publication

-

Progress at the INPI

  1. Filing11/01/78
  2. Publication
  3. Examination09/28/82
  4. Allowance01/10/84
  5. Grant07/31/84
  6. Expired05/02/95

The letters patent expired on 05/02/1995: 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: 07/31/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MINNESOTA MINING & MFG

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Inventors

M. K. (pessoa física)

W. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/31/1984

RPI 719

Notificação para pagamento de retribuição

#13.1

05/02/1984

RPI 706

Republicação - classificação IPC

#15.11

02/14/1984

RPI 695

Deferimento

#9.1

01/10/1984

RPI 690

Solicitação de exame técnico

#4.1

09/28/1982

RPI 623

Carta-patente expirada

#21.1

05/02/1995

RPI 1274

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