For the Inventor, By the Inventor

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Charlotte, NC, United States of America

Celgard Inc.

Calculating rank

USPTO Granted Patents = 179

% Expired Patents = 4.5

CIPO Patents = 4

EPO Patents = 22

Trademarks = 7

Forward Citations = 1,508

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132 inventors (with patents filed for the assignee):

Xiaomin Zhang (40 out of 46 patents)

Zhengming Zhang (37 out of 38 patents)

Lie Shi (33 out of 33 patents)

4. Kristoffer K Stokes (30 out of 44 patents)

5. Karl F Humiston (23 out of 24 patents)

6. C Glen Wensley (19 out of 27 patents)

7. Changqing Wang Adams (19 out of 20 patents)

8. Kang Karen Xiao (18 out of 19 patents)

9. Amitava Sengupta (16 out of 20 patents)

10. Stefan Reinartz (14 out of 15 patents)

11. Eric Robert White (13 out of 13 patents)

12. Robert A Nark (13 out of 13 patents)

13. Ronnie E Smith (13 out of 13 patents)

14. Ronald W Call (13 out of 13 patents)

15. Gareth Peter Taylor (13 out of 26 patents)

Core Competencies:

Battery Separators

Microporous Membranes

Lithium-Ion Batteries

Multilayer Membranes

Polyolefin Membranes

Ceramic Coating

High Voltage Batteries

Improved Additives

Functionalized Membranes

Solid State Batteries

Low Electrical Resistance

Coated Separators

179 patents: Sort by Forward Citations

1. 12759214 - Biaxially oriented porous membranes, composites, and methods of manufacture and use (2026-10-13),

2. 12756068 - Dry-process polyethylene membranes, coated membranes, separators, and related methods (2026-10-06),

3. 12738599 - Microporous membrane separators for lithium ion rechargeable batteries and related methods (2026-09-15),

4. 12617144 - Pin designs for high COF polymer membranes or separator membranes, membrane or separator tension measuring, and related methods (2026-05-05),

5. 12603321 - Battery separators, electrodes, cells, lithium batteries and related methods (2026-04-14),

6. 12573718 - Separator for electric storage device and electric storage device (2026-03-10),

7. 12573717 - Microporous membranes, separators, lithium batteries, and related methods (2026-03-10),

8. 12496815 - Multilayer porous membranes and methods of making the same (2025-12-16),

9. 12473416 - Functionalized porous membranes and methods of manufacture and use (2025-11-18),

10. 12469931 - Battery separator including microporous polyolefin membrane with ceramic coating (2025-11-11),

11. 12466119 - Microlayer membranes, improved battery separators, and related methods (2025-11-11),

12. 12431529 - High melt temperature microporous lithium-ion rechargeable battery separators and methods of preparation and use (2025-09-30),

13. 12427543 - Membranes, separators, batteries, and methods (2025-09-30),

14. 12417886 - Depositions or layers for microporous membranes, improved membranes, improved lithium battery separators, improved batteries, improved high voltage lithium batteries, and related methods (2025-09-16),

15. 12412956 - Battery separators, coated battery separators, batteries, and related methods (2025-09-09),

Company Overview

Celgard Inc., headquartered in Charlotte, NC, specializes in advanced battery separator technology, focusing on the development and manufacturing of microporous membranes essential for lithium-ion batteries. The company is recognized for its innovative multilayer and polyolefin membranes, which enhance battery performance and safety. Celgard also explores ceramic coatings and improved additives to support high voltage battery applications, positioning itself as a key player in the evolving energy storage landscape.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

179 Patents

#18 in Charlotte, NC

#67 in North Carolina

#2,262 in US

#4,667 in the World

Charlotte, NC, United States of America

Celgard Inc.

Forward Citations = 1,508

132 inventors:

Xiaomin Zhang (40 out of 46 patents)

Zhengming Zhang (37 out of 38 patents)

Lie Shi (33 out of 33 patents)

4. Kristoffer K Stokes (30 out of 44 patents)

5. Karl F Humiston (23 out of 24 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Celgard Inc.. Retrieved from https://idiyas.com/company/celgard

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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