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Hemlock, MI, United States of America

Hemlock Semiconductor Corporation

USPTO Granted Patents = 30

% Expired Patents = 30.0

EPO Patents = 3

Forward Citations = 262

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50 inventors (with patents filed for the assignee):

Arvid Neil Arvidson (7 out of 11 patents)

Michael John Molnar (6 out of 9 patents)

Richard A Burgie (5 out of 5 patents)

4. Lydia L Hwang (4 out of 4 patents)

5. Terence Lee Horstman (3 out of 6 patents)

6. Chris Tim Schmidt (3 out of 5 patents)

7. Scott Allen Wheelock (3 out of 3 patents)

8. Roger Dale Spencer, Jr (2 out of 4 patents)

9. Michael Bourbina (2 out of 3 patents)

10. David Hillabrand (2 out of 2 patents)

11. Theodore Knapp (2 out of 2 patents)

12. Joaquin Enrique Luna (2 out of 2 patents)

13. James R McCormick (2 out of 3 patents)

14. Richard C Dumler (2 out of 3 patents)

15. Owen A Heng (2 out of 2 patents)

Core Competencies:

Polysilicon

Silicon Production

Fluidized Bed Reactor

CVD Process

Impurity Measurement

Surface Protection

Float Zone Processing

Chlorosilane

30 patents: Sort by Forward Citations

1. 10431447 - Polysilicon chip reclamation assembly and method of reclaiming polysilicon chips from a polysilicon cleaning apparatus (2019-10-01),

2. 9687876 - Method of repairing and/or protecting a surface in a reactor (2017-06-27),

3. 9261464 - Applying edge-on photoluminescence to measure bulk impurities of semiconductor materials (2016-02-16),

4. 9079145 - Solids processing valve (2015-07-14),

5. 8951352 - Manufacturing apparatus for depositing a material and an electrode for use therein (2015-02-10),

6. 8926749 - Flowable chips and methods for the preparation and use of same, and apparatus for use in the methods (2015-01-06),

7. 8895324 - Method of determining an amount of impurities that a contaminating material contributes to high purity silicon (2014-11-25),

8. 8784565 - Manufacturing apparatus for depositing a material and an electrode for use therein (2014-07-22),

9. 8609058 - Silicon production with a fluidized bed reactor integrated into a Siemens-type process (2013-12-17),

10. 8021483 - Flowable chips and methods for the preparation and use of same, and apparatus for use in the methods (2011-09-20),

11. 7935327 - Silicon production with a fluidized bed reactor integrated into a siemens-type process (2011-05-03),

12. 7927984 - Silicon production with a fluidized bed reactor utilizing tetrachlorosilane to reduce wall deposition (2011-04-19),

13. 7080742 - Method and apparatus for improving silicon processing efficiency (2006-07-25),

14. 6605149 - Method of stacking polycrystalline silicon in process for single crystal production (2003-08-12),

15. 6251182 - Susceptor for float-zone apparatus (2001-06-26),

Company Overview

Hemlock Semiconductor Corporation, based in Hemlock, Michigan, specializes in the production of high-purity polysilicon, a critical material for the solar and semiconductor industries. The company is recognized for its commitment to innovation and sustainability, focusing on advanced manufacturing processes that enhance product quality and environmental stewardship. Hemlock Semiconductor plays a pivotal role in supporting the global transition to renewable energy and the advancement of technology through its high-performance materials.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

30 Patents

#1 in Hemlock, MI

#422 in Michigan

#11,257 in US

#21,853 in the World

Hemlock, MI, United States of America

Hemlock Semiconductor Corporation

Forward Citations = 262

50 inventors:

Arvid Neil Arvidson (7 out of 11 patents)

Michael John Molnar (6 out of 9 patents)

Richard A Burgie (5 out of 5 patents)

4. Lydia L Hwang (4 out of 4 patents)

5. Terence Lee Horstman (3 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hemlock Semiconductor Corporation. Retrieved from https://idiyas.com/company/hemlock-semiconductor

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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