% Expired Patents = 14.3

EPO Patents = 11

Forward Citations = 8

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3 inventors (with patents filed for the assignee):

Stephen Francis Lindsey (13 out of 13 patents)

Daniel A Konopka (1 out of 13 patents)

Jason A Seedig (1 out of 4 patents)

14 patents: Sort by Forward Citations

1. 11859724 - Check valve (2024-01-02),

2. 11859495 - Rotary piston and cylinder device with single stator side (2024-01-02),

3. 11536139 - Rotary piston and cylinder with the rotor including a formation and bearing arrangement (2022-12-27),

4. 11519268 - Rotary piston and cylinder device with flared curved rotor surface (2022-12-06),

5. 11319812 - Rotary piston and cylinder device having a dish ringed rotor (2022-05-03),

6. 11280018 - Electrochemical methods, devices and compositions (2022-03-22),

7. 11131193 - Rotary piston and cylinder device (2021-09-28),

8. 11008865 - Rotary piston and cylinder devices (2021-05-18),

9. 10961849 - Rotary piston and cylinder device (2021-03-30),

10. 10794186 - Rotary piston and cylinder devices (2020-10-06),

11. 10662775 - Rotary piston and cylinder devices (2020-05-26),

12. 10400601 - Rotary piston and cylinder device (2019-09-03),

13. 9879534 - Rotary piston and cylinder devices (2018-01-30),

14. 9057268 - Rotary piston and cylinder devices (2015-06-16),

Company Overview

Lontra Limited, based in Southam, GB, specializes in the development of innovative technologies aimed at enhancing energy efficiency and sustainability. The company focuses on advanced engineering solutions, particularly in the field of fluid dynamics and mechanical systems. Lontra's expertise lies in creating products that optimize performance while reducing environmental impact, contributing to a more sustainable future across various industries. Their research initiatives emphasize the integration of cutting-edge technology with practical applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

14 Patents

#1 in Southam

#1,268 in United Kingdom

#42,249 in the World

Southam, United Kingdom

Lontra Limited

Forward Citations = 8

3 inventors:

Stephen Francis Lindsey (13 out of 13 patents)

Daniel A Konopka (1 out of 13 patents)

Jason A Seedig (1 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Lontra Limited. Retrieved from https://idiyas.com/company/lontra

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]

11 patents (EPO):

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]