Lubrication system
US-12595881-B2 · Apr 7, 2026 · US
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Keith John patents
Keith John is listed as an inventor on 166 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Keith John |
| Total patents | 166 |
| First publication | Nov 12, 2020 |
| Latest publication | Apr 7, 2026 |
Notable patents
Publications ranked by popularity score, then publication date.
High pressure pump
US-12590575-B2 · Mar 31, 2026 · US
High pressure pump
US-D1120985-S · Mar 31, 2026 · US
Fluid end with threaded dynamic section
US-12590581-B2 · Mar 31, 2026 · US
Liquid cooled plunger system
US-2026063121-A1 · Mar 5, 2026 · US
Fluid end with clamped retention
US-12565889-B2 · Mar 3, 2026 · US
Packing seal assembly
US-12560156-B2 · Feb 24, 2026 · US
Modular power end
US-12560154-B2 · Feb 24, 2026 · US
Linear drive assembly
US-2026043394-A1 · Feb 12, 2026 · US
Modular power end
US-2026043397-A1 · Feb 12, 2026 · US
Recent patents
Latest publications not already listed above.
Fluid end with threaded dynamic section
US-2026036120-A1 · Feb 5, 2026 · US
Valve body
US-12529427-B2 · Jan 20, 2026 · US
Fluid end with threaded dynamic section
US-2026016005-A1 · Jan 15, 2026 · US
Fluid routing plug
US-12523205-B2 · Jan 13, 2026 · US
Fluid end
US-12516594-B2 · Jan 6, 2026 · US
Liquid cooled plunger system
US-12486840-B2 · Dec 2, 2025 · US
Fluid end with threaded dynamic section
US-2025354547-A1 · Nov 20, 2025 · US
Fluid routing plug
US-2025354542-A1 · Nov 20, 2025 · US
Fracturing pump arrangement using a plunger with an internal fluid passage
US-12473910-B2 · Nov 18, 2025 · US
Linear drive assembly
US-12473898-B1 · Nov 18, 2025 · US
Isolation gap in fluid end dynamic body
US-2025341211-A1 · Nov 6, 2025 · US
Macrocyclic chelators and methods of use thereof
US-12453785-B2 · Oct 28, 2025 · US
Multi-piece seat
US-2025320866-A1 · Oct 16, 2025 · US
Fluid end with clamped retention
US-2025305585-A1 · Oct 2, 2025 · US
Fluid routing plug
US-12421945-B2 · Sep 23, 2025 · US
Fluid routing plug
US-12421961-B2 · Sep 23, 2025 · US
Fracturing pump arrangement using a plunger with an internal fluid passage
US-2025290505-A1 · Sep 18, 2025 · US
Liquid cooled plunger system
US-2025290504-A1 · Sep 18, 2025 · US
Fluid end assembly
US-2025283465-A1 · Sep 11, 2025 · US
Fluid end with threaded dynamic section
US-2025283455-A1 · Sep 11, 2025 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Kerr Machine Co | 155 |
| Janssen Biotech Inc | 7 |
| Janssen Pharmaceutica Nv | 4 |
| Ker Machine Co | 1 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| E21B43/2607 | 119 |
| F04B53/16 | 112 |
| F04B53/22 | 98 |
| F04B1/0538 | 89 |
| F04B15/02 | 89 |