% Expired Patents = 44.4

Forward Citations = 66

Loading Chart...

6 inventors (with patents filed for the assignee):

Dimitris Ioannis Collias (8 out of 134 patents)

Andrew Julian Wnuk (6 out of 40 patents)

Blair Alex Owens (6 out of 12 patents)

4. Steven Michael Schennum (3 out of 13 patents)

5. Charles John Gilfert (2 out of 3 patents)

6. Sheng-Hsin Hu (1 out of 37 patents)

9 patents: Sort by Forward Citations

1. 6821387 - Use of fractionated fiber furnishes in the manufacture of tissue products, and products produced thereby (2004-11-23),

2. 6623806 - Methods for the reduction of bleeding of lignosulfonates from lignosulfonate-treated substrates (2003-09-23),

3. 6620461 - Methods for the reduction of bleeding of lignosulfonates from lignosulfonate-treated substrates (2003-09-16),

4. 6537616 - Stam-assisted paper impregnation (2003-03-25),

5. 6537615 - Steam-assisted paper impregnation (2003-03-25),

6. 6458419 - Methods for the reduction of bleeding of lignosulfonates from lignosulfonate-treated substrates (2002-10-01),

7. 6281350 - Methods for the reduction of bleeding of lignosulfonates from lignosulfonate-treated substrates (2001-08-28),

8. 6211357 - Strengthening compositions and treatments for lignocellulosic materials (2001-04-03),

9. 6194057 - Partially impregnated lignocellulosic materials (2001-02-27),

Company Overview

Paper Technology Foundation, Inc. (PTFI) is a non-profit organization dedicated to advancing the science and technology of papermaking. Founded in 1961, PTFI provides resources and support for research, education, and industry collaboration in the paper industry. The foundation works to improve efficiency, sustainability, and innovation in paper manufacturing processes through its various programs and initiatives.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

9 Patents

#25 in Kalamazoo, MI

#1,117 in Michigan

#32,588 in US

Kalamazoo, MI, United States of America

Paper Technology Foundation, Inc.

Forward Citations = 66

6 inventors:

Dimitris Ioannis Collias (8 out of 134 patents)

Andrew Julian Wnuk (6 out of 40 patents)

Blair Alex Owens (6 out of 12 patents)

4. Steven Michael Schennum (3 out of 13 patents)

5. Charles John Gilfert (2 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Paper Technology Foundation, Inc.. Retrieved from https://idiyas.com/company/paper-technology-foundation

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]