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For the Inventor, By the Inventor

Evanston, IL, United States of America

Northfield Laboratories, Inc.

USPTO Granted Patents = 17

% Expired Patents = 47.1


Forward Citations = 329

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16 inventors (with patents filed for the assignee):

goldMedal Arthur L Rosen (10 out of 11 patents)

silverMedal Lakshman R Sehgal (9 out of 10 patents)

bronzeMedal Steven A Gould (8 out of 9 patents)

4.  Marc Doubleday (7 out of 11 patents)

5.  Richard E DeWoskin (7 out of 7 patents)

6.  Richard E De Woskin (7 out of 8 patents)

7.  Hansa Sehgal (7 out of 8 patents)

8.  Gerald Moss (7 out of 25 patents)

9.  Anthony Avella (4 out of 4 patents)

10.  Richard L Beissinger (3 out of 5 patents)

11.  Darsh T Wasan (3 out of 4 patents)

12.  Robert McGinnis (2 out of 2 patents)

13.  Gabriel Chavez (2 out of 2 patents)

14.  George Hides (1 out of 1 patent)

15.  Lahksman R Sehgal (1 out of 1 patent)


17 patents:

1. 7521417 - Method and apparatus for preparing an acellular red blood cell substitute (2009-04-21),
2. 7435795 - Stabilized hemoglobin solutions (2008-10-14),
3. 7411044 - Polymerized hemoglobin solutions having reduced amounts of tetramer and method for preparing (2008-08-12),
4. 7291592 - Method for treating patients with massive blood loss (2007-11-06),
5. 7202341 - Stabilized hemoglobin solutions (2007-04-10),
6. 7135553 - Polymerized hemoglobin solutions having reduced amounts of tetramer and method for preparing (2006-11-14),
7. 6914127 - Acellular red blood cell substitute (2005-07-05),
8. 6552173 - Acellular red blood cell substitute (2003-04-22),
9. 6498141 - Method and apparatus for preparing an acellular red blood cell substitute (2002-12-24),
10. 6323320 - Acellular red blood cell substitute (2001-11-27),
11. 6133425 - Acellular red blood cell substitute (2000-10-17),
12. 5464814 - Acellular red blood cell substitute (1995-11-07),
13. 5438041 - Oxygen carrying multiple emulsions (1995-08-01),
14. 5217648 - Process for preparation of hemoglobin multiple emulsions (1993-06-08),
15. 5194590 - Acellular red blood cell substitute (1993-03-16),
Company Overview
Northfield Laboratories, Inc. is a biotechnology company based in Evanston, Illinois, specializing in the development of innovative blood substitutes and related medical technologies. The company focuses on creating products that enhance patient care during surgical procedures and trauma situations, aiming to address the limitations of traditional blood transfusions. Through its research efforts, Northfield Laboratories is committed to advancing the field of transfusion medicine and improving outcomes for patients in critical need.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

17 Patents

#17 in Evanston, IL

#975 in Illinois

#18,903 in US

#35,948 in the World

Evanston, IL (US)
Evanston, IL, United States of America

Northfield Laboratories, Inc.

Forward Citations = 329

16 inventors:

goldMedal Arthur L Rosen (10 out of 11 patents)

silverMedal Lakshman R Sehgal (9 out of 10 patents)

bronzeMedal Steven A Gould (8 out of 9 patents)

4.  Marc Doubleday (7 out of 11 patents)

5.  Richard E DeWoskin (7 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Northfield Laboratories, Inc.. Retrieved from https://idiyas.com/company/northfield-laboratories

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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