What is the difference between a plant patent and a utility patent?
A plant patent and a utility patent are two distinct types of U.S. patent protection that serve different purposes. A plant patent covers a specific asexually reproduced plant variety; a utility patent covers a much broader range of subject matter, including plants, seeds, and plant-related processes. For practitioners advising agricultural or horticultural clients, knowing which type fits the subject matter, and where the two types interact, shapes the entire filing strategy.
What a plant patent covers
Plant patents are governed by 35 U.S.C. § 161, which authorizes a patent for any person who invents or discovers and asexually reproduces any distinct and new variety of plant. Eligible plant types include cultivated sports, mutants, hybrids, and newly found seedlings. Tuber-propagated plants and plants found in an uncultivated state are expressly excluded.
The patent grant, defined in 35 U.S.C. § 163, gives the owner the right to exclude others from asexually reproducing the plant, and from using, offering for sale, or selling the plant so reproduced or any of its parts, throughout the United States, or from importing the plant so reproduced or any parts thereof. That scope is limited to asexual reproduction; it does not extend to sexual reproduction through seeds.
The application rules under 35 U.S.C. § 162 also differ from standard utility patent practice. A plant patent application may contain only a single claim, expressed in formal terms to the plant shown and described. The description standard is relaxed as well: no plant patent shall be declared invalid for noncompliance with section 112 if the description is as complete as is reasonably possible.
What a utility patent covers for plants
Under 35 U.S.C. § 101, a utility patent covers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof. In J.E.M. Ag Supply, Inc. v. Pioneer Hi-Bred International, Inc., the Supreme Court held that newly developed plant breeds fall within the subject matter of § 101, and that utility patents may cover plants, including sexually reproduced varieties and seeds.
A utility patent for a plant-related invention can therefore protect subject matter a plant patent cannot: seeds and sexually reproduced varieties. Multiple claims at varying levels of breadth are permitted, and no special rule relaxes the description and enablement requirements.
Key differences at a glance
| Dimension | Plant patent | Utility patent |
|---|---|---|
| Governing statute | 35 U.S.C. § 161 | 35 U.S.C. § 101 |
| Subject matter | Asexually reproduced plant varieties | Processes, machines, manufactures, compositions (including plants, seeds) |
| Seeds and sexual reproduction | Not covered | Coverable |
| Number of claims | Single claim to the plant as described | Multiple claims at varying breadth |
| Description standard | As complete as reasonably possible | Full § 112 requirements |
| Maintenance fees | None | Required |
Term and maintenance fees
A plant patent has a term of 20 years from the date of filing the application. A utility patent's term is likewise 20 years measured from the U.S. filing date. Despite the equal term length, there is a meaningful operational difference: under 35 U.S.C. § 41, no maintenance fee may be established for a plant patent. Utility patents require maintenance fees at intervals during the patent term, and only design and plant patents are exempt from those fees.
The seeds gap: the critical practical distinction
The most commercially significant difference is that plant patents do not cover seeds or sexually reproduced plants. Because the § 163 grant runs against asexual reproduction only, a competitor who acquires the patented plant, grows it to produce seeds, and sells those seeds is not infringing the plant patent. This is the most common scope trap in plant IP counseling.
For seed-based technologies, a utility patent is the required vehicle. The J.E.M. Ag Supply holding confirmed that utility patents are available for seed-based inventions with the full scope of § 101, which allows the applicant to claim the seed itself, the plant grown from the seed, and the method of producing it.
When to file which
| Situation | Recommended path |
|---|---|
| New ornamental variety reproduced by cutting, grafting, or layering | Plant patent |
| New variety sold commercially as seed | Utility patent |
| New breeding method or production process | Utility patent |
| New variety with both asexual and seed markets | Consider both |
| Tuber-propagated variety (potatoes, Jerusalem artichoke) | Utility patent or PVPA |
A note on the Plant Variety Protection Act
For sexually reproduced varieties that may not qualify for or require a utility patent, a third option exists. The Plant Variety Protection Act (7 U.S.C. § 2402) extends protection to breeders of sexually reproduced, tuber-propagated, or asexually reproduced plant varieties other than fungi or bacteria. It is administered by the Plant Variety Protection Office within the Department of Agriculture, not the USPTO. PVPA certificates and utility patents address different needs and may apply simultaneously to the same variety.
Practical notes for practitioners
- Scope trap: A plant patent's protection is limited to asexual reproduction. A competitor who produces and sells seed from a patented plant is not necessarily infringing the plant patent, even if the seed-grown plant is genetically identical to the patented variety.
- Single-claim limitation: Because a plant patent may have only one claim, there is no opportunity to draft independent and dependent claims at varying scope. The entire protection rises or falls on a single claim to the described plant.
- Tuber exclusion: Potatoes and Jerusalem artichokes cannot receive plant patents because they are tuber-propagated plants expressly excluded by § 161. For a new potato variety, the path to protection is a utility patent or a PVPA certificate.
- No maintenance fees: Plant patents carry no ongoing maintenance fee obligation. For ornamental breeders managing a large portfolio of varieties with modest individual revenue, this can be a meaningful cost advantage over a portfolio of utility patents.
- Dual filing: Where a variety is commercially significant in both asexual propagation (nursery stock) and seed form, a utility patent with broad claims to the variety may provide coverage a plant patent alone cannot.