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For the Inventor, By the Inventor

Wilmington, DE, United States of America

Herbert H Espy

USPTO Granted Patents = 11

Average Co-Inventor Count = 1.5

ph-index = 7

Forward Citations = 171(Granted Patents)


Location History:

  • Fairfax, DE (US) (1976)
  • Wilmington, DE (US) (1976 - 1997)

Company Filing History:

goldMedal11 out of 1,197 
 
Hercules Corporation
 patents

Years Active: 1976-1997

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11 patents (USPTO):Explore Patents
1. 5674358 - Repulping wet strength paper and paperboard with persulfate and a (1997-10-07),
2. 5656699 - Oligoamide-epichlorohydrin resins as drainage aids (1997-08-12),
3. H001613 - Polyamide-epichlorohydrin wet-strength resins with reduced content of (1996-11-04),
4. 5338807 - Synthesis of creping aids based on polyamides containing methyl (1994-08-16),
5. 5316623 - Absorbance and permanent wet-strength in tissue and toweling paper (1994-05-31),
6. 5275698 - Enhancement of tissue paper softness with minimal effect on strength (1994-01-04),
7. 4751337 - Conversion of solid dicyclopentadiene to a liquid monomer for use in (1988-06-14),
8. 4458042 - Absorbent material (1984-07-03),
9. 3966694 - Cationic water soluble polymeric reaction product of (1976-06-29),
10. 3966684 - Cationic water soluble polymeric reaction product of (1976-06-29),
11. 3951921 - Cationic water soluble resinous reaction product of (1976-04-20),

Title: Innovations of Herbert H. Espy: A Pioneer in Paper Technology

Introduction

Herbert H. Espy, a notable inventor based in Wilmington, Delaware, has made significant contributions to the field of paper technology. With a portfolio of 11 patents, his innovative work has focused on enhancing the repulping processes and drainage aids used in the paper manufacturing industry.

Latest Patents

Among his latest patents, Espy has developed methods for repulping wet strength paper and paperboard. The innovative repulping process employs a composition of nonchlorinated oxidizing agents, specifically persulfates, combined with carbonates to achieve a pH of 7-12. This groundbreaking method is particularly effective for repulping paper that incorporates wet strength resins.

Additionally, Espy has patented a water-soluble drainage-aid composition. This composition results from a chemical reaction involving a bifunctional crosslinking agent, which may include epihalohydrins, and an oligoamide product derived from a polyalkylene polyamine and selected carboxylic acids. This patent outlines a process for creating a drainage-aid that improves dewatering in paper manufacture, significantly enhancing the efficiency of the production process.

Career Highlights

Espy has dedicated much of his career to Hercules Corporation, where he has been able to apply his inventive ideas to improve paper production technologies. His substantial experience and insights into the interactions of various chemical components in paper manufacturing have positioned him as a leader in his field.

Collaborations

Throughout his career, Espy has had the privilege of collaborating with esteemed colleagues such as Stearns T. Putnam and Sunil P. Dasgupta. These collaborations have resulted in a fruitful exchange of ideas and advancements in the paper technology sector, paving the way for future innovations.

Conclusion

Herbert H. Espy's inventive spirit and dedication to advancing paper technology have resulted in impressive contributions to the industry. With 11 patents under his belt, he continues to influence and improve methods in paper production, showcasing the importance of innovation and collaboration in the field. His achievements serve as an inspiration for aspiring inventors and industry professionals alike.

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