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    Author(s): Roland GleisnerJulie Blankenburg
    Date: 2003
    Source: Progress in paper recycling. Vol. 12, no. 3 (May 2003): pages 26-33.
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (87 KB)


    This review summarizes patents related to paper recycling that were issued during the last six months of 2002. Two on-line databases, Claims/U.S. Patents Abstracts and Derwent World Patents Index, were searched for this review. This semiannual feature is intended to inform readers about recent developments in equipment design, chemicals, and process technology for recycling paper, and alternative products derived from postconsumer paper. Only brief summaries of individual inventions are included in this review. Because many of the patents are not readily available in English, much of the information was extracted from abstracts that were translated to English. For more complete information, readers will need to access the full text of a specific patent. Three excellent on-line sources for further review are located at: •; •; • As an indication of the amount of patent activity in the papermaking field, the 48 patents reviewed here were se-lected from 215 patent abstracts obtained from the initial search. Selection was based on what was considered to be the specific application of the patented technology to pa-per recycling as compared to papermaking in general.

    Publication Notes

    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Gleisner, Roland; Blankenburg, Julie. 2003. Semiannual patents review July 2002–December 2002. Progress in paper recycling. Vol. 12, no. 3 (May 2003): pages 26-33.


    Contaminants, deinking chemicals, enzymes, patents, re-claimed fibers, recycling, review articles, stickies, wastepaper, pulping, bleaching, deinking, industrial equipment, coatings, sludge, stickies

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