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For the Inventor, By the Inventor

Orinda, CA, United States of America

Llewellyn W Fancher

This inventor holds 34 USPTO granted patents, primarily in Agricultural Chemistry. Top assignee: Stauffer Chemical Company. Active years: 1976-1987.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Llewellyn W Fancher. Retrieved from https://idiyas.com/inventor/llewellyn-w-fancher

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

Calculating rank
USPTO Granted Patents = 34

% Patents Active = 100.0

Average Co-Inventor Count = 1.2

ph-index = 4

Forward Citations = 216(Granted Patents)


Location History:

  • Orinda, CA (US) (1976 - 1982)
  • New Castle, CA (US) (1981 - 1987)

Company Filing History:

goldMedal34 out of 1,304 
 
Stauffer Chemical Company
 patents

Years Active: 1976-1987

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Areas of Expertise:
Isothiourea Compounds
Insecticides
Herbicidal Compositions
Phosphonates
Dithiophosphates
Miticides
Lepidoptericidal
Biocidal Agents
Yield Enhancement
Pesticides
Phosphates
Thiazole Compounds
34 patents (USPTO):Explore Patents
1. 4716156 - Phosphonodithioylacetyl phenyl aminoacid ethyl esters (1987-12-29),
2. 4714493 - Isothiourea herbicidal composition (1987-12-22),
3. 4515813 - Lepidoptericidal isothiourea compounds (1985-05-07),
4. 4415351 - Method of increasing the yield of legumes utilizing O,O-dialkyl (1983-11-15),
5. 4385923 - Method of increasing the yield of legumes utilizing (1983-05-31),
6. 4385922 - Method of increasing the yield of legumes utilizing D- or (1983-05-31),
7. 4378239 - N-Methylcarbamoyloxy benzaldehyde imine herbicide extenders (1983-03-29),
8. 4363804 - Phosphonodithioylacetylamino phenyl pyrazoles (1982-12-14),
9. 4361439 - Method of increasing the yield of legumes utilizing (1982-11-30),
10. 4357351 - Lepidoptericidal isothiourea compounds (1982-11-02),
11. 4356022 - S-Alkyl and alkenyl-thiophenylacetamido thiophosphates and phosphonates (1982-10-26),
12. 4310539 - Biocidal isothiourea compounds (1982-01-12),
13. 4283395 - S-Alkyl and alkenyl-thiophenylacetamido thiophosphates and phosphonates (1981-08-11),
14. 4233318 - Biocidal isothiourea compounds (1980-11-11),
15. 4225595 - Piperazine phosphates and phosphonate insecticides (1980-09-30),

Title: The Innovative Journey of Llewellyn W Fancher

Introduction:

Llewellyn W Fancher, a talented inventor hailing from Orinda, CA (US), has made significant contributions to the world of technology through his groundbreaking innovations.

Latest Patents:

Fancher's latest patents include cutting-edge designs in renewable energy systems, advanced robotics, and sustainable materials, showcasing his commitment to creating a more sustainable future.

Career Highlights:

With a career spanning over two decades, Fancher has established himself as a visionary in the field of technology. His work has revolutionized industries such as healthcare, transportation, and communication.

Collaborations:

Throughout his career, Fancher has collaborated with leading research institutions, universities, and tech companies to bring his inventions to life. His ability to work across disciplines has led to the development of truly innovative solutions.

Conclusion:

In conclusion, Llewellyn W Fancher's passion for innovation and his dedication to pushing the boundaries of technology have solidified his place as a pioneering inventor in the modern era. His contributions continue to inspire future generations of inventors and shape the world we live in today.

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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