Degradable cigarette filter: pill with multilayered coating

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8397733
APP PUB NO 20110174324A1
SERIAL NO

12687912

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Abstract

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A degradable cigarette filter includes a filter element of a bloomed cellulose acetate tow and a plug wrap surrounding the filter element, and a pill dispersed in the tow. The pill includes a material adapted to catalyze hydrolysis of the cellulose acetate tow that is encapsulated with an inner layer of a water soluble or water permeable material and an outer layer of a cellulose acetate having a D.S. in the range of 2.0-2.6.

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Patent Owner(s)

Patent OwnerAddress
ACETATE INTERNATIONAL LLC222 W LAS COLINAS BLVD SUITE 900N IRVING TX 75039

International Classification(s)

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  • 2010 Application Filing Year
  • A24B Class
  • 60 Applications Filed
  • 45 Patents Issued To-Date
  • 75 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances20102011201220132014201520162017201820192020202120220255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Robertson, Raymond M Blacksburg, US 29 195

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Patent Citation Ranking

  • 2 Citation Count
  • A24B Class
  • 24.24 % this patent is cited more than
  • 12 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges8175301 - 1011 - 2021 - 300123456789101112131415161718

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