For the Inventor, By the Inventor

Enter assignee name

Charlotte, NC, United States of America

Daramic, Inc.

Calculating rank

USPTO Granted Patents = 119

% Expired Patents = 4.2

EPO Patents = 27

Trademarks = 7

Forward Citations = 448

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60 inventors (with patents filed for the assignee):

J Kevin Whear (59 out of 60 patents)

Eric Henri Miller (59 out of 60 patents)

Jeffrey K Chambers (25 out of 25 patents)

4. Ahila Krishnamoorthy (23 out of 23 patents)

5. James P Perry (18 out of 21 patents)

6. John Randolph Timmons (14 out of 14 patents)

7. Robert Saffel (12 out of 13 patents)

8. Tejas R Shah (9 out of 12 patents)

9. Joseph G Yaritz (9 out of 16 patents)

10. Mohammed Naiha (8 out of 8 patents)

11. M Neal Golovin (8 out of 8 patents)

12. Mark T DeMeuse (8 out of 15 patents)

13. Jerry Zucker (8 out of 26 patents)

14. Jörg Deiters (7 out of 7 patents)

15. Klaus Heinrich Ihmels (5 out of 5 patents)

Core Competencies:

Battery Separators

Lead Acid Batteries

Oxidation Protection

Enhanced Performance

Water Loss

VRLA Batteries

Functionalized Separators

Cross Ribs

Microporous Materials

Idle Start Stop Vehicles

Heavy Metal Removal

Composite Layers

119 patents: Sort by Forward Citations

1. 12712210 - LAMINATED OXIDATION PROTECTED SEPARATOR (2026-08-18),

2. 12678741 - Microporous membranes, underlayment, roofing, flashing, wrap, and methods for making and using the same (2026-07-14),

3. 12548850 - Separators for VRLA batteries and methods relating thereto (2026-02-10),

4. 12394867 - Lead acid battery separators, warp resistant separators, batteries, systems, and related methods (2025-08-19),

5. 12388155 - Separators for enhanced flooded batteries, batteries, and related methods (2025-08-12),

6. 12334587 - Separators, lead acid batteries, and methods and systems associated therewith (2025-06-17),

7. 12334586 - Composite layers or separators for lead acid batteries (2025-06-17),

8. 12237534 - Battery separators with cross ribs and related methods (2025-02-25),

9. 12230769 - Functionalized lead acid battery separators, improved lead acid batteries, and related methods (2025-02-18),

10. 12215228 - Separators, batteries, systems, and methods for idle start stop vehicles (2025-02-04),

11. 12176494 - Battery separators with improved conductance, improved batteries, systems, and related methods (2024-12-24),

12. 12159976 - Oxidation protected separator (2024-12-03),

13. 12148951 - Separators, lead acid batteries, and methods and systems associated therewith (2024-11-19),

14. 12125988 - Water loss separators used with lead acid batteries, systems for improved water loss performance, and methods of manufacture and use thereof (2024-10-22),

15. 12113237 - Separators with fibrous mat, lead acid batteries using the same, and methods and systems associated therewith (2024-10-08),

Company Overview

Daramic, Inc. is a leading provider of advanced battery separators, specializing in technologies that enhance the performance and longevity of lead acid batteries. Based in Charlotte, NC, the company focuses on innovations such as oxidation protection and functionalized separators, which contribute to reduced water loss and improved efficiency in valve-regulated lead acid (VRLA) batteries. Daramic's expertise in cross ribs and other separator technologies positions it as a key player in the energy storage sector, catering to various applications across industries.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

119 Patents

#21 in Charlotte, NC

#85 in North Carolina

#3,247 in US

#6,706 in the World

Charlotte, NC, United States of America

Daramic, Inc.

Forward Citations = 448

60 inventors:

J Kevin Whear (59 out of 60 patents)

Eric Henri Miller (59 out of 60 patents)

Jeffrey K Chambers (25 out of 25 patents)

4. Ahila Krishnamoorthy (23 out of 23 patents)

5. James P Perry (18 out of 21 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Daramic, Inc.. Retrieved from https://idiyas.com/company/daramic

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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