Patent · US Expired

Filter and method of making same

US4309247A · kind A · utility

75Cited by
12References
12Claims
0Family size

Assignee

Inventors

Key dates

Filing dateFeb 21, 1980
Grant dateJan 5, 1982
Priority date—
Expiry dateFeb 21, 2000

Classification

  • Technology area (CPC D)Textiles; Paper
  • CPC primaryD21H11/22
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

Filter media sheets comprising particulate retention aid consisting of cellulose pulp of +100 to -100 Canadian Standard Freeness, and method of making the same.

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