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Portsmouth, VA, United States of America

Virginia Chemicals Inc.

USPTO Granted Patents = 29

Trademarks = 2

Forward Citations = 292

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23 inventors (with patents filed for the assignee):

Ernest W Schumacher (11 out of 11 patents)

Charles E Winslow (4 out of 7 patents)

Leonard C Ellis (4 out of 6 patents)

4. Frank B Gupton (3 out of 22 patents)

5. Logan C Bostian (3 out of 3 patents)

6. Edwin D Little (3 out of 4 patents)

7. Mearl A Kise (2 out of 2 patents)

8. Harry E Ulmer (2 out of 24 patents)

9. John P Clarke (2 out of 2 patents)

10. Stephen E Evans (2 out of 2 patents)

11. Karsten R Minzghor (2 out of 2 patents)

12. James C Robinson (1 out of 3 patents)

13. Mark A Schroeder (1 out of 3 patents)

14. Joseph L Bush (1 out of 4 patents)

15. Robert W Barton (1 out of 1 patent)

Core Competencies:

Sodium Dithionite

Pentaerythritol

Aqueous Suspensions

Hydrosulfite Slurries

Refrigerant Systems

Pressure Control

Chemical Treatment

Dithiocarbonate Diesters

Byproduct Recovery

Air-Conditioning

Thermostatic Expansion Valve

Liquid Trapping Accumulator

29 patents: Sort by Forward Citations

1. 4863564 - Method of bleaching high yield pulp by using dithionite ion and (1989-09-05),

2. 4729886 - Method of preparing reproducibly stable aqueous suspensions of sodium (1988-03-08),

3. 4622216 - Treatment of sodium dithionite reaction mixture (1986-11-11),

4. 4612389 - Treatment of waste stream from pentaerythritol manufacture (1986-09-16),

5. 4569797 - Production of isoxanthate salts and dithiocarbonate diesters (1986-02-11),

6. 4534954 - Sodium hydrosulfite slurries (1985-08-13),

7. 4503262 - Process for the production of 2,6-diisopropylnaphthalene dihydroperoxide (1985-03-05),

8. 4423618 - Rehardening of copper connectors (1984-01-03),

9. 4364756 - Refrigerant suction line filter/filter-drier and method for the (1982-12-21),

10. 4354362 - Integral suction line accumulator/filter-drier (1982-10-19),

11. 4328366 - Treatment of waste stream from pentaerythritol production (1982-05-04),

12. 4310338 - Replaceable float oil separator (1982-01-12),

13. 4288402 - Acid field test kit for refrigeration oils containing a leak detector (1981-09-08),

14. 4283303 - Process for manufacture of stable sodium dithionite slurries (1981-08-11),

15. 4277620 - Byproduct recovery from a pentaerythritol waste stream (1981-07-07),

Company Overview

Virginia Chemicals Inc., based in Portsmouth, VA, specializes in the development and manufacturing of a diverse range of chemical products. The company focuses on delivering innovative solutions tailored to various industries, including agriculture, pharmaceuticals, and industrial applications. With a commitment to quality and sustainability, Virginia Chemicals leverages advanced research and technology to enhance product performance and meet the evolving needs of its customers in both domestic and international markets.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

29 Patents

#1 in Portsmouth, VA

#201 in Virginia

#11,631 in US

#22,570 in the World

Portsmouth, VA, United States of America

Virginia Chemicals Inc.

Forward Citations = 292

23 inventors:

Ernest W Schumacher (11 out of 11 patents)

Charles E Winslow (4 out of 7 patents)

Leonard C Ellis (4 out of 6 patents)

4. Frank B Gupton (3 out of 22 patents)

5. Logan C Bostian (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Virginia Chemicals Inc.. Retrieved from https://idiyas.com/company/virginia-chemicals

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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