# US 12,757,837 B2 · Methods and apparatuses for cold plasma in agriculture

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,757,837 B2
- Document ID: US12757837B2
- Status: Granted
- Kind: B2
- Application number: 19/065,654
- Filed: 2025-02-27
- Published: 2025-09-25
- Granted: 2026-10-13
- Earliest claimed: 2017-11-14
- Assignees: Plasmology4, Inc.
- Applicants: Plasmology4, Inc.
- Inventors: Emilia M. Kulaga; Gregory A. Watson
- Web page: https://patentgrep.com/patent/US12757837B2

## CPC

- A01G 7/00: Botany in general
- A01C 21/00: Methods of fertilising {, sowing or planting}
- A01C 23/023: {for liquid or gas fertilisers}
- A01C 23/047: {Spraying of liquid fertilisers}
- A01G 7/04: Electric or magnetic {or acoustic} treatment of plants for promoting growth
- A01M 7/0032: {Pressure sprayers}
- A01M 13/00: Fumigators; Apparatus for distributing gases {(poisoning or narcotising insects by vaporising an insecticide A01M1/2022)}
- A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12)
- A01C: PLANTING; SOWING; FERTILISING (parts, details or accessories of agricultural machines or implements, in general A01B51/00 - A01B75/00)
- A01M: CATCHING, TRAPPING OR SCARING OF ANIMALS (appliances for catching swarms or drone-catching A01K57/00; fishing A01K69/00 - {A01K99/00}; biocides, pest repellants or attractants A01N); APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS

## Abstract

Methods and systems for generating a plasma-activated liquid or gas, and applying the plasma-activated liquid for agricultural use. A system embodiment includes a hand-held device that can be pointed and directed at different target areas of a plant. A method embodiment includes generating a plasma discharge in a gas environment or a liquid environment, and applying the gas/liquid to a plant.

## Claims

### Claim 1

A method for production of plasma-activated liquids, the method comprising:
immersing a first electrode and a second electrode into liquid in a container;
energizing, by a high voltage power supply, the first electrode and the second electrode to form a plasma between the first electrode and the second electrode to thereby generate plasma-activated liquid; and
etching material from at least one of the first electrode and the second electrode into the plasma-activated liquid.

### Claim 2 (depends on 1)

The method of claim 1, wherein the liquid is one of water, distilled water or nutrient-enriched liquid.

### Claim 3 (depends on 1)

The method of claim 1, wherein energizing by the high voltage power supply includes energizing by a DC power supply, an AC power supply, a pulsed DC power supply, a pulsed AC power supply, a harmonic RF power supply, or a RF power supply operating at microwave frequencies.

### Claim 4 (depends on 1)

The method of claim 1, further comprising:
applying the plasma activated liquid to a plant.

### Claim 5 (depends on 4)

The method of claim 4, wherein applying the plasma-activated liquid to a plant includes applying the plasma-activated liquid to a root zone of the plant, or to a foliage of the plant.

### Claim 6 (depends on 1)

The method of claim 1, further comprising:
filtering the etched material from the plasma activated liquid; and
applying the filtered etched material to a plant.

### Claim 7 (depends on 1)

The method of claim 1, further comprising:
mixing the plasma-activated liquid with a second liquid, and
wherein the applying the plasma-activated liquid includes applying the mixed plasma activated liquid.

### Claim 8 (depends on 1)

The method of claim 1, further comprising:
periodically adjusting at least one of the first electrode and the second electrode to maintain the plasma between the first electrode and the second electrode.

### Claim 9 (depends on 1)

The method of claim 1, wherein energizing, by the high voltage power supply, the first electrode and the second electrode occurs for a predetermined period of time.

### Claim 10 (depends on 1)

The method of claim 1, wherein energizing, by the high voltage power supply, the first electrode and the second electrode occurs until a desired chemistry of liquid is achieved.

### Claim 11 (depends on 1)

The method of claim 1, wherein the first electrode comprises graphite.

### Claim 12 (depends on 1)

The method of claim 1, wherein the second electrode comprises silver.