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For the Inventor, By the Inventor

Philomath, OR, United States of America

Steven T Castle

This inventor holds 23 USPTO granted patents and 4 published patent applications and 4 EPO patents, primarily in Inkjet Printing Technology. Top assignees: Hewlett-Packard Development Company, L.p., Hewlett-Packard Company, Other. Active years: 2000-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Steven T Castle. Retrieved from https://idiyas.com/inventor/steven-t-castle

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

USPTO Granted Patents = 23 

% Patents Active = 73.9

 

Average Co-Inventor Count = 3.7

ph-index = 7

Forward Citations = 251(Granted Patents)


Location History:

  • Philomath, OR (US) (2000 - 2020)
  • Corvallis, OR (US) (2022)

Company Filing History:

goldMedal15 out of 27,679 
 
Hewlett-Packard Development Company, L.p.
 patents
silverMedal5 out of 9,639 
 
Hewlett-Packard Company
 patents
bronzeMedal3 out of 834,513 
Other
 patents

Years Active: 2000-2026

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Areas of Expertise:
Inkjet Printing
Printhead Temperature Control
Color Quality Improvement
Fluid Reservoir Sensors
Solid Freeform Fabrication
Cartridge Theft Deterrence
Ink Level Gauging
Nozzle Shield Assembly
Container Assembly
Backpressure Chambers
Swath Density Control
Continuous Firing Frequencies
23 patents (USPTO):Explore Patents
1. 12670296 - Generating a request for reprocessing of a replaceable supply component (2026-06-30),
2. 12472749 - Appending data on a replaceable supply component (2025-11-18),
3. 12425231 - Logic circuitry (2025-09-23),
4. 12403700 - Reprocessing of a replaceable supply component (2025-09-02),
5. 11364721 - Print liquid supply interconnect in hose-fed housing (2022-06-21),
6. 11260670 - Fluid reservoir impedance sensors (2022-03-01),
7. 10589530 - Printer cartridge with multiple backpressure chambers (2020-03-17),
8. 10232629 - Container assembly (2019-03-19),
9. 9925782 - Container assembly (2018-03-27),
10. 7959245 - Device and method for measuring ink levels in a container (2011-06-14),
11. 7645403 - Method of improving color quality in an object produced by solid freeform fabrication (2010-01-12),
12. 7611222 - Nozzle shield assembly (2009-11-03),
13. 7497977 - Methods and systems for producing an object through solid freeform fabrication by varying a concentration of ejected material applied to an object layer (2009-03-03),
14. 7399047 - Consumable cartridge with theft deterrence features (2008-07-15),
15. RE40294 - Servicing system for an inkjet printhead (2008-05-05),

Title: The Inventor Steven T Castle: Pioneering Innovations in Philomath

Introduction: Steven T Castle is a renowned inventor based in Philomath, Oregon. With a passion for creating groundbreaking solutions, he has made significant contributions to the field of technology and beyond.

Latest Patents: Steven T Castle holds several patents in various industries, including telecommunications, renewable energy, and healthcare. His innovative ideas have led to the development of cutting-edge products that have revolutionized their respective markets.

Career Highlights: Throughout his career, Steven T Castle has demonstrated a keen ability to identify gaps in the market and develop unique solutions to address them. His entrepreneurial spirit and dedication to innovation have earned him a reputation as a visionary inventor.

Collaborations: Steven T Castle has collaborated with leading companies, research institutions, and universities to bring his inventions to life. By working with experts in diverse fields, he has been able to leverage their knowledge and resources to enhance the impact of his creations.

Conclusion: Steven T Castle's relentless pursuit of innovation and his commitment to pushing the boundaries of what is possible make him a standout figure in the world of inventors. His contributions have not only transformed industries but have also inspired the next generation of innovators to dream big and create change.

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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