Patent · US Expired

Chimney cleaning system and chimney cleaning element

US4138758A · kind A · utility

8Cited by
2References
2Claims
0Family size

Inventors

Key dates

Filing dateAug 15, 1977
Grant dateFeb 13, 1979
Priority date—
Expiry dateAug 15, 1997

Classification

  • Technology area (CPC F)Mechanical Engineering; Lighting; Heating
  • CPC primaryF23J3/026
  • WIPO fieldEnvironmental technology
  • WIPO sectorChemistry

Abstract

A permanently emplaceable chimney cleaning system is provided with a removable cleaning element which is flexible as to shape and dimension.

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