15.1 Design Patents & Plant Patents

15.1 Design Patents & Plant Patents

While utility patents cover functional inventions, the U.S. Patent and Trademark Office (USPTO) also grants specialized patent protection for non-functional ornamental designs and distinct plant varieties. Understanding the specific statutory provisions, procedural rules, and term calculations for design and plant patents is essential for the Patent Bar examination, as these topics frequently appear in procedural and statutory comparison questions.

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Design Patents (35 U.S.C. §§ 171–173 & MPEP Chapter 1500)

Statutory Basis and Ornamentality Requirement

Under 35 U.S.C. § 171, a design patent may be obtained by whoever invents any new, original, and ornamental design for an article of manufacture. Design patent protection extends solely to the aesthetic visual appearance of an object, not its functional or structural utility.

Key legal principles governing design patentability include:

• Article of Manufacture: The design must be embodied in or applied to an article of manufacture. Pure abstract designs or artwork unattached to an article are ineligible.
• Ornamentality vs. Functionality: If a design is dictated solely by functional considerations, it cannot be patented as a design patent (In re Carletti). However, if the functional article can take multiple visual forms, the selected visual appearance is ornamental and eligible.
• Statutory Provisions Applicable: Under 35 U.S.C. § 171, all statutory provisions relating to utility patents (such as 35 U.S.C. § 102 novelty and § 103 nonobviousness) apply to design patents except as otherwise provided.

Single Claim Format and Drawing Requirements

Design patent applications follow distinct procedural rules set forth in 37 C.F.R. § 1.153 and MPEP § 1503:

1. Single Claim Rule: Exactly one claim is permitted in a design patent application. The claim must follow a strict statutory format: "The ornamental design for [an article of manufacture] as shown and described."
2. Drawing Primacy: The drawings define the scope of protection. What is shown in solid lines constitutes the claimed design. Features shown in broken (dashed) lines indicate unclaimed environment, structural boundaries, or disclaimed portions.
3. No Description Required: A lengthy written description is generally unnecessary and discouraged unless required to explain surface ornamentation, translucent materials, or broken-line conventions.

Design Patent Term and Maintenance Fee Exemption

Calculating the term of a design patent depends on the filing date of the application:

• Post-May 13, 2015 Applications: Under the Patent Law Treaties Implementation Act of 2012, design patents resulting from applications filed on or after May 13, 2015, have a term of 15 years from the date of grant (35 U.S.C. § 173).
• Pre-May 13, 2015 Applications: Design patents resulting from applications filed before May 13, 2015, have a term of 14 years from the date of grant.
• No Maintenance Fees: Unlike utility patents, design patents require zero maintenance fees at 3.5, 7.5, or 11.5 years (35 U.S.C. § 41(b)). Once granted, the design patent remains active for its full statutory term without annuity payments.

International Design Applications (Hague Agreement)

Chapter 2900 of the MPEP covers International Design Applications filed under the Hague Agreement:

• Applicants may file a single international design application designating the United States and other member contracting parties.
• The USPTO acts as an Office of Receipt for U.S. citizens or residents.
• International design applications designating the U.S. are published by WIPO and examined by the USPTO for patentability under 35 U.S.C. § 171.

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Plant Patents (35 U.S.C. §§ 161–164 & MPEP Chapter 1600)

Statutory Scope and Eligibility

Under 35 U.S.C. § 161, a plant patent may be granted to anyone who invents or discovers and asexually reproduces any distinct and new variety of plant.

Statutory exclusions under § 161 explicitly bar plant patent protection for:

• Tuber-propagated plants: Plants propagated by Irish potatoes and Jerusalem artichokes are excluded by statute.
• Bacteria: Unicellular organisms and bacteria are excluded from plant patent protection (though genetically engineered bacteria may qualify for utility patents).
• Uncultivated Wild Plants: Plants discovered in an uncultivated or wild state are not eligible; the discovery must occur in a cultivated area, followed by asexual reproduction.

The Mandatory Asexual Reproduction Requirement

Asexual reproduction is the crucial requirement for a plant patent. It consists of propagating the plant without using seeds, ensuring that offspring are genetically identical clones of the parent plant. Methods include grafting, budding, cutting, layering, division, and tissue culture.

Crucial exam facts regarding asexual reproduction:

• The applicant must have successfully asexually reproduced the plant prior to filing the patent application.
• Asexual reproduction proves the stability of the new plant variety across successive generations.
• If a plant is reproduced only through sexual reproduction (seeds), it cannot receive a plant patent under 35 U.S.C. § 161.

Plant Patent Specifications, Terms, and Fee Rules

• Specification: Under 35 U.S.C. § 162, the specification must be as complete as reasonably possible. Exactly one claim is allowed (37 C.F.R. § 1.163).
• Plant Patent Term: Under 35 U.S.C. § 161, plant patents inherit the general patent term provision of 35 U.S.C. § 154: 20 years from the controlling filing date under § 154(a)(2).
• Maintenance Fees: Plant patents are exempt from maintenance fees under 35 U.S.C. § 41(b).

Plant Patent Act vs. Plant Variety Protection Act (PVPA)

Patent Bar questions frequently test the distinctions between USPTO Plant Patents and USDA Plant Variety Protection Certificates:

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Summary Comparison Table: Patent Categories