Patent · US Expired

Air freshener device with a ceramic container and an absorbent pad

US5299736A · kind A · utility

4Cited by
9References
5Claims
0Family size

Inventor

Key dates

Filing dateMay 17, 1993
Grant dateApr 5, 1994
Priority date—
Expiry dateMay 17, 2013

Classification

  • Technology area (CPC A)Human Necessities
  • CPC primaryA61L9/12
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

An air freshener device, comprising a container with porous ceramic walls defining a closed internal space, a closure member for selectively permitting access to and sealing the internal space, and a replaceable absorbent pad the absorbent pad being impregnated with a fragrant substance adapted for insertion into the internal space so as to occupy only a portion thereof and release fragrant vapors into the internal space at a controlled rate. The released fragrant vapors first build up within the internal space and then diffuse through the porous walls of the container for release into the atmosphere.

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