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Portsmouth, VA, United States of America

Virginia Chemicals Inc.

USPTO Granted Patents = 29

Trademarks = 3

Forward Citations = 291

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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)

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),

Virginia Chemicals Inc. is a leading chemical manufacturing company based in Virginia. With over 20 years of experience in the industry, we specialize in the production and distribution of high-quality chemical products for various sectors including agriculture, pharmaceuticals, industrial processes, and more. Our state-of-the-art facilities and advanced manufacturing processes ensure that we consistently deliver superior products to our customers. Committed to excellence, we prioritize customer satisfaction and maintain strict quality control measures throughout our operations. Visit our website to learn more about our wide range of chemical products and how we can cater to your specific requirements.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

29 Patents

#1 in Portsmouth, VA

#207 in Virginia

#11,224 in US

#21,855 in the World

Portsmouth, VA, United States of America

Virginia Chemicals Inc.

Forward Citations = 291

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)

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