Theodora Retsina

This inventor holds 71 USPTO granted patents and 84 published patent applications, plus 8 CIPO patents and 8 EPO patents, primarily in Nanocellulose Production (CPC class C12P). Top assignees: Granbio Intellectual Property Holdings, LLC, Api Intellectual Property Holdings, LLC, American Process International LLC. Active years: 2001-2025.

USPTO Granted Patents = 71 (Patent Applications = 84)

% Patents Active = 97.2

CIPO Patents = 8 (Patent Applications = 18)

EPO Patents = 8 (Patent Applications = 24)

Average Co-Inventor Count = 2.5

ph-index = 8

Forward Citations = 225(Granted Patents)

Forward Citations (Not Self Cited) = 177(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Altanta, GA (US) (2014)
Atlanta, GA (US) (2001 - 2024)

Company Filing History:

34 out of 47

Granbio Intellectual Property Holdings, LLC

patents

29 out of 37

Api Intellectual Property Holdings, LLC

patents

2 out of 2

American Process International LLC

patents

4. 2 out of 2

American Process, Inc.

7. 3 out of 834,411

Other

patents

where one patent can have more than one assignee

Years Active: 2001-2025

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Areas of Expertise:

Nanocellulose

Lignocellulosic Biomass

Enzymatic Hydrolysis

Hydrothermal Conversion

Cellulose Compositions

Bioproducts

Drilling Fluid Additives

Hydrophobic Materials

Composite Materials

Pharmaceutical Excipients

Corrugated Medium

Biochemical Production

71 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12492267 - Nanocellulose compositions and processes to produce same (2025-12-09),

2. 12291731 - Methods and systems for enzymatic hydrolysis of pretreated biomass at high solids concentrations (2025-05-06),

3. 12195782 - Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products (2025-01-14),

4. 12188181 - Sulfite-based processes for producing nanocellulose, and compositions and products produced therefrom (2025-01-07),

5. 12134729 - Drilling fluid additives and fracturing fluid additives containing cellulose nanofibers and/or nanocrystals (2024-11-05),

6. 12091818 - Processes for producing nanocellulose, and nanocellulose compositions produced therefrom (2024-09-17),

7. 12077915 - Nanocellulose-reinforced corrugated medium (2024-09-03),

8. 12077910 - Nanocellulose production co-located at a pulp and paper mill (2024-09-03),

9. 12077654 - Hydrophobic nanocellulose-coated paper and paperboard (2024-09-03),

10. 12018432 - Processes and systems for producing nanocellulose from old corrugated containers (2024-06-25),

11. 12006374 - Nanocellulose compositions and processes to produce same (2024-06-11),

12. 11932706 - Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom (2024-03-19),

13. 11905341 - Solvent-based processes for producing nanocellulose, and compositions and products produced therefrom (2024-02-20),

14. 11834523 - Nanolignocellulose compositions and processes to produce these compositions (2023-12-05),

15. 11827771 - Oleophilic and hydrophobic nanocellulose materials (2023-11-28),

Title: The Innovator Unveiling Sustainable Solutions: Theodora Retsina

Introduction:

Meet Theodora Retsina, an accomplished inventor hailing from Atlanta, GA, with a remarkable portfolio of 60 patents. She is a pioneering figure in the field of sustainable materials and processes, revolutionizing the production of nanocellulose through innovative methods and applications.

Latest Patents:

Theodora Retsina's latest patents showcase her expertise in the production of nanocellulose, a versatile material with a wide range of applications. Her processes and apparatus for producing nanocellulose involve converting biomass into high-crystallinity nanocellulose with minimal mechanical energy input. By fractionating biomass and mechanically treating cellulose-rich solids, she creates nanofibrils and nanocrystals with exceptional reinforcing properties for composites. Additionally, her solvent-based processes offer a sustainable approach to producing nanocellulose, utilizing various organic solvents to generate cellulose nanofibrils and nanocrystals.

Career Highlights:

Theodora Retsina has made significant contributions to the field of nanocellulose production through her work with companies like Api Intellectual Property Holdings, LLC, and Granbio Intellectual Property Holdings, LLC. Her groundbreaking innovations have paved the way for eco-friendly materials that have the potential to transform industries and reduce environmental impact.

Collaborations:

Throughout her career, Theodora Retsina has collaborated with esteemed colleagues such as Vesa Pylkkanen and Kimberly Nelson. Together, they have pushed the boundaries of material science and sustainability, working towards a greener future through their inventive solutions.

Conclusion:

In conclusion, Theodora Retsina stands out as a trailblazer in the realm of sustainable innovation, with a diverse portfolio of patents that reflect her commitment to environmental stewardship and technological advancement. Her work not only showcases her ingenuity and expertise but also serves as a testament to the power of innovation in driving positive change.