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For the Inventor, By the Inventor

Koenigstein, Germany

Helmold Von Plessen

This inventor holds 14 USPTO granted patents. Top assignee: Hoechst Aktiengesellschaft. Active years: 1976-1995.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Helmold Von Plessen. Retrieved from https://idiyas.com/inventor/helmold-von-plessen

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 14

% Patents Active = 100.0

Average Co-Inventor Count = 2.4

ph-index = 4

Forward Citations = 42(Granted Patents)


Location History:

  • Kelkheim, Taunus, DE (1976 - 1977)
  • Kelkheim, DE (1979 - 1980)
  • K/o/ nigstein, DE (1984)
  • Konigstein/Taunus, DE (1988 - 1994)
  • Konigstein, DE (1990 - 1995)

Company Filing History:

goldMedal14 out of 6,705 
 
Hoechst Aktiengesellschaft
 patents

Years Active: 1976-1995

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14 patents (USPTO):Explore Patents
1. 5464876 - Process for the recovery of valuable materials during the work-up of (1995-11-07),
2. 5308600 - Process for conditioning waste sulfuric acid (1994-05-03),
3. 5047558 - Process for the preparation of a dioxane adduct of (1991-09-10),
4. 4925959 - Dioxane adduct of 2-hydroxynaphthalene-6-carboxylic acid and process for (1990-05-15),
5. 4916257 - Process for the purification of 2-hydroxynaphthalene-6-carboxylic acid (1990-04-10),
6. 4794204 - Process for the removal of dimethyl ether in methyl chloride (1988-12-27),
7. 4479924 - Process for the separation of heavy metal compounds from phosphoric acid (1984-10-30),
8. 4194952 - Process for regenerating waste sulfuric acid (1980-03-25),
9. 4150103 - Foam prevention during the regeneration of waste sulfuric acid with (1979-04-17),
10. 4148858 - Process for the protection against corrosion of cast iron boilers (1979-04-10),
11. 4145393 - Process for the protection against corrosion of cast iron in boiling (1979-03-20),
12. 4032622 - Method of concentrating sulfuric acid using a boiler of improved cast (1977-06-28),
13. 4010240 - Process for the regeneration of sulfuric acid (1977-03-01),
14. 3972987 - Process for regenerating sulfuric acid (1976-08-03),

Title: The Innovations of Helmold von Plessen

Introduction: Helmold von Plessen, an esteemed inventor hailing from Königstein/Taunus, Germany, has made significant contributions to the field of material recovery and waste processing. With a remarkable portfolio of ten patents, he has established himself as a leader in innovative processes aimed at enhancing environmental sustainability and resource efficiency.

Latest Patents: Among his latest contributions, Helmold von Plessen has developed a groundbreaking process for the recovery of valuable materials during the heating of polyvinyl chloride (PVC). Specifically, he focuses on heating plasticizer-containing PVC to temperatures ranging from 250 to 500 degrees Celsius in an oxygen-free environment. This process results in a low-chlorine, carbon-containing residue alongside the extraction of plasticizers and hydrogen chloride. Additionally, he has innovated a process for conditioning waste sulfuric acid, demonstrating his commitment to improving waste management practices.

Career Highlights: Helmold von Plessen has devoted his talents to Hoechst Aktiengesellschaft, where he has played a pivotal role in advancing chemical research and development. His persistent dedication to innovative solutions has not only contributed to the company's success but has also significantly impacted the industry.

Collaborations: Throughout his career, Helmold has worked alongside esteemed colleagues, including Siegbert Rittner and Siegfried Schiessler. These collaborations have fostered an environment of innovation and have collectively led to groundbreaking advancements in their respective fields.

Conclusion: Helmold von Plessen stands as a testament to the power of innovation in addressing environmental challenges. With his impressive array of patents and a commitment to sustainable practices, he continues to inspire future inventors within the realm of chemical engineering and material recovery. His work serves as a crucial reminder of the importance of innovation in fostering a more sustainable world.

Profile summary based on public USPTO records.
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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