Patent · US Expired

Method of locally impregnating sealing materials with a fluid-tight impregnant

US3950576A · kind A · utility

10Cited by
6References
20Claims
0Family size

Assignee

Inventor

Key dates

Filing dateApr 15, 1974
Grant dateApr 13, 1976
Priority date—
Expiry dateApr 15, 1994

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB32B2581/00
  • WIPO fieldSurface technology, coating
  • WIPO sectorChemistry

Abstract

Impregnating porous material such as sealing materials by introducing a viscous liquid impregnating material under high pressure into the surface of a limited zone of said porous material.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.