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For the Inventor, By the Inventor

Oxford, United Kingdom

Powderject Research Limited

USPTO Granted Patents = 35

% Expired Patents = 25.7


Forward Citations = 1,654

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39 inventors (with patents filed for the assignee):

goldMedal Brian John Bellhouse (13 out of 34 patents)

silverMedal John Christopher Greenford (10 out of 11 patents)

bronzeMedal David Francis Sarphie (10 out of 12 patents)

4.  Stuart G Weekes (6 out of 23 patents)

5.  Yuh-Fun Maa (4 out of 15 patents)

6.  Emily L Bellhouse (4 out of 4 patents)

7.  Terry L Burkoth (4 out of 25 patents)

8.  Bruce MacMichael (3 out of 3 patents)

9.  Duncan Westland (3 out of 3 patents)

10.  John Bell (3 out of 3 patents)

11.  Charles David Potter (3 out of 3 patents)

12.  Graeme L Paterson (3 out of 4 patents)

13.  Steven J Prestrelski (2 out of 28 patents)

14.  Sung Yun Kwon (2 out of 5 patents)

15.  David Stuart Potter (2 out of 9 patents)


Core Competencies:
Needleless Syringe
Particle Delivery
Supersonic Gas Flow
Hydrogel Particle
Immunodiagnostics
Trans-mucosal Delivery
Disposable Injector
Monitoring Methods
Particle Formation
Delivery Techniques
Cassette Kit
Small Quantities

35 patents:

1. 8349364 - Nucleic acid coated particles suitable for temporary storage (2013-01-08),
2. 8061006 - Particle cassette, method and kit therefor (2011-11-22),
3. 7942846 - Needleless syringe using supersonic gas flow for particle delivery (2011-05-17),
4. 7909793 - Silencing device and method for needleless syringe (2011-03-22),
5. 7868260 - Apparatus and method for dispensing small quantities of particles (2011-01-11),
6. 7618394 - Needleless syringe using supersonic gas flow for particle delivery (2009-11-17),
7. 7547292 - Needleless syringe (2009-06-16),
8. 7358451 - Apparatus and method for dispensing small quantities of particles (2008-04-15),
9. 7229645 - Spray freeze-dried compositions (2007-06-12),
10. 7207967 - Particle delivery (2007-04-24),
11. 7182748 - Syringe and capsule therefor (2007-02-27),
12. D519633 - Syringe (2006-04-25),
13. 7022313 - Hydrogel particle formulation (2006-04-04),
14. 6987228 - Apparatus and method for dispensing small quantities of particles (2006-01-17),
15. 6893664 - Particle delivery techniques (2005-05-17),
Company Overview
Powderject Research Limited is a biotechnology company based in Oxford, UK, specializing in the development of innovative drug delivery systems. The organization focuses on needle-free vaccine delivery technologies, leveraging its expertise in powder formulation and aerosolization. By advancing methods for administering vaccines and therapeutics, Powderject aims to enhance patient compliance and improve healthcare outcomes. Its research initiatives contribute significantly to the fields of immunology and pharmaceutical sciences.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

35 Patents

#9 in Oxford

#517 in United Kingdom

#19,181 in the World

Oxford, GB
Oxford, United Kingdom

Powderject Research Limited

Forward Citations = 1,654

39 inventors:

goldMedal Brian John Bellhouse (13 out of 34 patents)

silverMedal John Christopher Greenford (10 out of 11 patents)

bronzeMedal David Francis Sarphie (10 out of 12 patents)

4.  Stuart G Weekes (6 out of 23 patents)

5.  Yuh-Fun Maa (4 out of 15 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Powderject Research Limited. Retrieved from https://idiyas.com/company/powderject-research

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

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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