Patent ID: 11958006
Assignee: B.G. NEGEV TECHNOLOGIES AND APPLICATIONS LTD., AT BEN-GURION UNIVERSITY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A method of making a filter comprising LIG, wherein the method comprises the steps of:
(a) exposing a first side of a sheet comprising a LIG precursor material to a first laser source, wherein
(i) the exposing on the first side results in formation of LIG on the first side of the sheet,
(ii) the LIG is derived from the LIG precursor material, and
(iii) some of the LIG precursor material on the first side of the sheet is not exposed to the first laser source such that it remains LIG precursor material on the first side of the sheet; and

(b) treating the second side of the sheet, wherein
(i) the second side of the sheet is on the opposite side of the first side of the sheet,
(ii) the step of treating the second side comprises exposing the second side of the sheet to a second laser source to form LIG on the second side of the sheet,
(iii) the second laser source is (A) the first laser source or (B) a different laser source than the first laser source,
(iv) the LIG on the first side of the sheet and the LIG on the second side of the sheet are adjacent and provide a porosity to the sheet such that the sheet is a LIG filter configured to allow a flow of air through the LIG from the first side of the sheet to the LIG on the second side of the sheet,
(v) the LIG precursor material not formed into LIG by the exposing of the first laser source on the first side is a support of the LIG formed on the first side, and
(vi) the LIG precursor material not formed into LIG by the exposing of the second laser source on the second side is a support of the LIG formed on the second side.