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For the Inventor, By the Inventor

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Sunds Defibrator Industries Ab

Calculating rank
USPTO Granted Patents = 32

% Expired Patents = 3.1


Forward Citations = 189

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42 inventors (with patents filed for the assignee):

goldMedal Kurt Schedin (3 out of 5 patents)

silverMedal Olof G Kjellqvist (3 out of 6 patents)

bronzeMedal Ingemar Sundqvist (3 out of 4 patents)

4.  Borje Fredriksson (3 out of 4 patents)

5.  Leif Odmark (2 out of 4 patents)

6.  Kjell Forslund (2 out of 18 patents)

7.  Goran Lundgren (2 out of 4 patents)

8.  Sven-Ingvar Thorbjornsson (2 out of 6 patents)

9.  Nils G Virving (2 out of 19 patents)

10.  Kjell Sjodin (2 out of 2 patents)

11.  Thomas Eriksson (1 out of 56 patents)

12.  Veikko Kankaanpää (1 out of 4 patents)

13.  Per Fröberg (1 out of 2 patents)

14.  Tomas Wikström (1 out of 3 patents)

15.  Lars Obitz (1 out of 7 patents)


Core Competencies:
Oxygen Delignification
Pulp Dewatering
Refining Elements
Board Manufacturing
Fiber Suspension
Pre-Pressing
Screening Apparatus
Chelating Agent
Chip-Washing
Lignocellulosic Boards
Servomotors
Liquid Treatment

32 patents:

1. 6454900 - Method for two-stage oxygen delignification of chemical pulp (2002-09-24),
2. 6080344 - Method of pre-pressing fibrous material during the manufacture of board (2000-06-27),
3. 6042036 - Refining element (2000-03-28),
4. 6036818 - Pulp-dewatering roll press (2000-03-14),
5. 6000552 - Process for purification of a fiber suspension (1999-12-14),
6. 5996770 - Plug screw feeder (1999-12-07),
7. 5989468 - Method of continuous production of lignocellulosic boards (1999-11-23),
8. 5989465 - Method of manufacturing a board (1999-11-23),
9. 5980689 - Method of separating metal ions from pulp using a chelating agent (1999-11-09),
10. 5970862 - Seal in a roll press (1999-10-26),
11. 5950946 - Pair of co-operating refining elements intended for a disc refiner (1999-09-14),
12. 5932156 - Method for producing lignocellulosic boards (1999-08-03),
13. 5925249 - Screening arrangement (1999-07-20),
14. 5917166 - Method of washing sawdust and arrangement for carrying out the method (1999-06-29),
15. 5902456 - Dewatering apparatus (1999-05-11),
Company Overview
Sunds Defibrator Industries AB specializes in the development and manufacturing of advanced equipment for the pulp and paper industry. The company focuses on refining technologies that enhance the production of high-quality pulp, contributing to sustainable practices within the sector. With a strong emphasis on innovation, Sunds Defibrator is dedicated to providing solutions that improve efficiency and reduce environmental impact, serving clients primarily in Europe and beyond.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

32 Patents

#9 in

#17 in Sweden

#20,712 in the World

SE
SE

Sunds Defibrator Industries Ab

Forward Citations = 189

42 inventors:

goldMedal Kurt Schedin (3 out of 5 patents)

silverMedal Olof G Kjellqvist (3 out of 6 patents)

bronzeMedal Ingemar Sundqvist (3 out of 4 patents)

4.  Borje Fredriksson (3 out of 4 patents)

5.  Leif Odmark (2 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sunds Defibrator Industries Ab. Retrieved from https://idiyas.com/company/sunds-defibrator-industries-ab

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]
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