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For the Inventor, By the Inventor

Portage, MI, United States of America

Verlan H Van Rheenen

This inventor holds 11 USPTO granted patents. Top assignees: The Upjohn Co., Bridge Organics Co.. Active years: 1976-2004.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Verlan H Van Rheenen. Retrieved from https://idiyas.com/inventor/verlan-h-van-rheenen

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

USPTO Granted Patents = 11

% Patents Active = 90.9

Average Co-Inventor Count = 1.3

ph-index = 4

Forward Citations = 81(Granted Patents)


Location History:

  • Kalamazoo, MI (US) (1976)
  • Kalamazoo County, MI (US) (1984)
  • Portage, MI (US) (1976 - 2004)

Company Filing History:

goldMedal10 out of 2,170 
 
The Upjohn Co.
 patents
silverMedal1 out of 2 
 
Bridge Organics Co.
 patents

Years Active: 1976-2004

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11 patents (USPTO):Explore Patents
1. 6812358 - Process for making estra-4,9(10)-diene steroids (2004-11-02),
2. 4548748 - Cyanohydrin process (1985-10-22),
3. 4526720 - Process to prepare stabilized monolithium acetylide (1985-07-02),
4. 4501695 - Spironalactone process (1985-02-26),
5. 4451404 - 16.beta.-Methyl steroid process (1984-05-29),
6. 4443377 - Isomerization-acylation process (1984-04-17),
7. 4154748 - Phosphate catalyzed acylation of steroidal tertiary alcohols (1979-05-15),
8. 4061657 - Process for preparing a 2(R) or 2(S) tricyclic lactone glycol (1977-12-06),
9. 4041055 - Process for the preparation of 17.alpha.-hydroxyprogesterones and (1977-08-09),
10. 3965118 - Lactone intermediates (1976-06-22),
11. 3953473 - Tricyclic lactone glycol sulfonates (1976-04-27),

Title: Verlan H Van Rheenen: Innovator in Steroid Chemistry

Introduction

Verlan H Van Rheenen is a notable inventor based in Portage, MI (US), recognized for his significant contributions to the field of steroid chemistry. With a total of 11 patents to his name, he has developed innovative processes that have advanced the production of biologically active substances.

Latest Patents

Among his latest patents is a process for making estra-4,9(10)-diene steroids. This novel method allows for the synthesis of estra-4,9(10)-diene-3,17-dione steroids from readily available 19-nor-androst-4-ene-3-one steroids through a straightforward three-step process. The products generated from this process serve as important intermediates in the preparation of biologically active substances. Another significant patent is the cyanohydrin process, which utilizes cyanohydrin intermediates to transform 17-keto steroids into corticoids and 17.alpha.-acyl progesterones.

Career Highlights

Throughout his career, Van Rheenen has worked with prominent companies such as The Upjohn Company and Bridge Organics Company. His work in these organizations has contributed to the advancement of steroid chemistry and the development of new pharmaceutical products.

Collaborations

He has collaborated with notable coworkers, including Kenneth P Shephard and Dae Y Cha, further enhancing the impact of his work in the field.

Conclusion

Verlan H Van Rheenen's innovative approaches in steroid chemistry have led to significant advancements in the production of biologically active substances. His contributions continue to influence the pharmaceutical industry and the field of chemistry.

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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