Patent · US Expired

Method of making a product for dispensing a volatile substance

US4094119A · kind A · utility

85Cited by
3References
10Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMar 18, 1977
Grant dateJun 13, 1978
Priority date—
Expiry dateMar 18, 1997

Classification

  • Technology area (CPC A)Human Necessities
  • CPC primaryA01N25/18
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

A method of making a product, which holds and dispenses a volatile substance, comprises the steps of advancing a backing material, a reservoir material and a third material, that is permeable to the volatile substance, from respective supplies into close proximity to each other with the reservoir material lying between the backing and permeable materials. The volatile substance is then supplied to the reservoir material to be absorbed thereby. The three materials are fused together in a pattern defining a closed loop periphery to seal the reservoir material between the backing and reservoir materials at the periphery and thereby form the product.

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