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For the Inventor, By the Inventor

Middletown, OH, United States of America

The Black Clawson Company

USPTO Granted Patents = 120


Forward Citations = 1,532

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83 inventors (with patents filed for the assignee):

goldMedal David E Chupka (27 out of 30 patents)

silverMedal Peter Seifert (26 out of 29 patents)

bronzeMedal Richard S Tetro (12 out of 12 patents)

4.  Derald R Hatton (9 out of 9 patents)

5.  Larry D Markham (7 out of 7 patents)

6.  Terry L Bliss (6 out of 6 patents)

7.  Richard W Phelps (6 out of 6 patents)

8.  Richard W Creagan (5 out of 5 patents)

9.  Heinz K Nowisch (5 out of 5 patents)

10.  Clinton R Parks (4 out of 5 patents)

11.  David E Suica (4 out of 13 patents)

12.  Christopher M Vitori (4 out of 6 patents)

13.  Paul E Harmon (4 out of 4 patents)

14.  Andrew C Martin (4 out of 4 patents)

15.  Robert F Moeller (3 out of 5 patents)


Core Competencies:
Pulping
Deinking
Thickening
Comminuting
Extrusion
Screening
Hydraulic
Winding
Froth Flotation
Paper Stock
Continuous Winder
Gravity Washer

120 patents:

1. 6210757 - Pressurized enclosed gravure applicator and method (2001-04-03),
2. 6019924 - Extrusion die with adjusting sliding die lips and method of use (2000-02-01),
3. 5845867 - Continuous winder (1998-12-08),
4. 5762756 - Methods and apparatus for pulping and deinking (1998-06-09),
5. 5711153 - Precision hydraulic adjustable stop (1998-01-27),
6. 5599098 - Extruder screw with multiple flighting (1997-02-04),
7. 5599097 - Extruder screw for plastic extruders (1997-02-04),
8. 5591336 - Apparatus for dewatering and or washing papermaking stock (1997-01-07),
9. 5582686 - High pressure water jet comminuting (1996-12-10),
10. 5466335 - Paper pulp washing (1995-11-14),
11. 5385240 - Screening apparatus with adjustable hydrofoil portion (1995-01-31),
12. 5384014 - Apparatus and method for thickening pulp and paper stock (1995-01-24),
13. 5382327 - Apparatus for thickening pulp and paper stock (1995-01-17),
14. 5367894 - Apparatus and method for washing cellulosic pulp (1994-11-29),
15. 5356496 - Splice tail tape-down method and apparatus (1994-10-18),
Company Overview
The Black Clawson Company, based in Middletown, Ohio, specializes in advanced pulping technology, focusing on the development and manufacturing of equipment for the paper and recycling industries. Their expertise encompasses a range of core technologies, including pulping, deinking, thickening, comminuting, extrusion, screening, hydraulic systems, and winding solutions. With a commitment to innovation, Black Clawson plays a pivotal role in enhancing the efficiency and sustainability of pulp and paper production processes.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

120 Patents

#2 in Middletown, OH

#151 in Ohio

#3,223 in US

#6,659 in the World

Middletown, OH (US)
Middletown, OH, United States of America

The Black Clawson Company

Forward Citations = 1,532

83 inventors:

goldMedal David E Chupka (27 out of 30 patents)

silverMedal Peter Seifert (26 out of 29 patents)

bronzeMedal Richard S Tetro (12 out of 12 patents)

4.  Derald R Hatton (9 out of 9 patents)

5.  Larry D Markham (7 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: The Black Clawson Company. Retrieved from https://idiyas.com/company/black-clawson-company

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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