35 U.S.C. §§ 171–173 · Patent Prosecution
Design Patent Process
How design patents work, what they protect, the drawings requirements that define your scope, the ordinary observer infringement test, and how to file and prosecute a design patent from scratch.
The one-paragraph answer
A design patent protects how a product looks — not how it works. It has one claim, defined almost entirely by its drawings, lasts 15 years from grant, and has no maintenance fees. Infringement is determined by whether an ordinary observer would be deceived into thinking the accused design is the same as the patented design. Design patents are cheaper and faster than utility patents, making them an underused first line of IP protection for consumer products.
Design patent at a glance
15 years
Term from date of grant (no maintenance fees)
1 claim
'The ornamental design for [article], as shown'
7 views
Standard drawings: front, back, sides, top, bottom, perspective
$1,500–5,000
Typical cost (professional filing, small entity)
~15–18 months
Typical time to first office action
§§ 171–173
Statutory basis (35 U.S.C.)
D + number
Format of issued design patent number (e.g., D593,087)
Hague System
International filing route (WIPO) — 95+ countries
The process
How to file a design patent — step by step
Prepare drawings
Create professional patent drawings showing all 7 standard views (front, back, left, right, top, bottom, perspective). Use solid lines for claimed features and broken lines for unclaimed context. This is the most critical step — the drawings define your scope.
Pro tip
Hire a design patent illustrator or a firm specializing in design patent drawings. Amateur drawings are frequently rejected or result in narrower-than-intended claims.
Determine what to claim (solid vs broken lines)
Decide which elements to claim (solid lines) and which to disclaim (broken lines). Broader claims = broken lines for non-critical elements. Narrower claims = solid lines for all visible features. Broken-line strategy gives flexibility but also creates prior art limitations.
Pro tip
File a family of design applications if different embodiments are important. Each design patent can have only one claim (one design), but you can file multiple applications.
Prepare and file the application
Design patent applications include: (1) Preamble identifying the applicant, (2) Title of the design (e.g., 'Ornamental design for a smartphone'), (3) Brief description of the drawings, (4) One claim: 'The ornamental design for [article], as shown and described.', (5) All required drawing views. No abstract or background section required.
Pro tip
File within 12 months of any public disclosure to preserve US rights. For international protection, file within 6 months for Paris Convention priority for design applications, or use the Hague System for international designs.
Examination
USPTO assigns the application to a design patent examiner. Examination is typically faster than utility patents — 14–18 months to first office action. Design examiners reject based on § 102 (prior design too similar) and § 103 (obvious combination of prior designs). Functional features are not rejected for § 101 purposes but are not protected.
Pro tip
Design patent office actions are less common than utility patent OAs, but they do occur. Respond by arguing the distinctions in overall visual impression, or amend by converting some solid lines to broken lines to narrow scope.
Allowance and grant
If allowed, pay the issue fee. The design patent issues and receives a 'D' number (e.g., D593,087). Term: 15 years from the date of grant. No maintenance fees due — ever. The issued design patent can be recorded with Customs for border enforcement.
Pro tip
Record your design patent with US Customs (CBP) to block infringing imports. This is often more effective than litigation for product knockoffs manufactured overseas.
Comparison
Design patent vs utility patent vs trade dress
| Design Patent | Utility Patent | Trade Dress | |
|---|---|---|---|
| Protects | Ornamental appearance | How it works | Product look as brand identifier |
| Term | 15 years from grant | 20 years from filing | Perpetual (with use) |
| Maintenance fees | None | 3.5, 7.5, 11.5 years | None |
| Requires distinctiveness | No | No | Yes (secondary meaning) |
| Requires non-functionality | Yes (partially) | No | Yes (strictly) |
| Cost to obtain | $1,500–$5,000 | $8,000–$15,000+ | $5,000–$15,000+ (registration) |
| Infringement test | Ordinary observer | All-elements (literal + DOE) | Likely confusion (consumers) |
| International route | Hague System | PCT | Madrid Protocol (marks) |
FAQ
Design patent questions
What does a design patent protect?
A US design patent protects the ornamental (visual) appearance of a manufactured article — how it looks, not how it works. A design patent covers the specific shape, configuration, surface ornamentation (patterns, lines, colors), or a combination of these, as applied to an article of manufacture. It does not protect functional features — any aspect of the design that is solely dictated by function cannot be design-patented. Famous design patents include: Apple's iPhone design (D593,087), the Coca-Cola bottle shape, the iconic Eames chair, and Google's search results page layout. Design patents cannot protect: the functionality of the article, purely abstract designs not applied to an article, and purely informational content (text, symbols without a design context).
How are design patents different from utility patents?
Design patents and utility patents protect different aspects of the same product and have different requirements: Term: design patents last 15 years from grant; utility patents last 20 years from filing. Maintenance fees: design patents have none; utility patents require fees at 3.5, 7.5, and 11.5 years. Claims: a design patent has one claim ('The ornamental design for [article], as shown'); utility patents can have dozens of claims covering structure, method, and composition. Scope: design patents cover appearance; utility patents cover how the invention works. Specification: design patents consist almost entirely of drawings; utility patents have extensive written descriptions. Cost: design patents are cheaper ($1,500–$5,000 professionally filed vs $8,000–$15,000+ for utility). Time to grant: design patents typically take 1.5–2 years; utility patents can take 2–4 years. Infringement standard: design patents use the 'ordinary observer' test; utility patents use the all-elements rule for each claim. A product can and often should have both a design patent and utility patent protection.
What are the drawing requirements for a design patent application?
Design patent drawings are the heart of the application — they define the scope of protection. Requirements: (1) Sufficient views: typically 7 views — front, back, left side, right side, top, bottom, and perspective. Additional views (cross-sections, detail views) if needed to clearly show the design. (2) Line consistency: solid lines show the claimed portions of the design; broken lines (dashed) show unclaimed portions — the article context or features excluded from the claim. This distinction is strategic: if you want flexibility, put features in broken lines. (3) No shading that obscures: surface shading should clarify the 3D form without hiding details. (4) Professional quality: USPTO requires black-and-white drawings or color photographs (with a petition if color). (5) The single claim must exactly match the drawings. USPTO design examining attorneys are known for strict technical requirements — professional design patent illustrators or firms specializing in design patent drawings are strongly recommended.
What is the 'ordinary observer' infringement test for design patents?
The ordinary observer test, established by Egyptian Goddess, Inc. v. Swisa, Inc. (Fed. Cir. 2008) (en banc), is the standard for design patent infringement: a design patent is infringed if an ordinary observer, familiar with the prior art, would be deceived into thinking the accused design is the same as the patented design. The test asks whether the overall visual impression of the accused product is substantially similar to the patented design, not whether specific elements are copied. Critically, the ordinary observer is not an expert — they are a typical purchaser of the type of product. Prior art matters: the more similar the prior art is to the patented design, the closer the accused design must be to infringe. This test replaced the earlier 'point of novelty' test, which required identifying specific novel elements — Egyptian Goddess held that the overall comparison is the right approach.
Should I file a design patent or rely on trade dress?
Design patents and trade dress overlap but protect different things and have different advantages. Design patents: 15-year fixed term, no maintenance fees, no need to prove acquired distinctiveness or secondary meaning, rights arise from the patent grant (not use), and clear scope (the drawings). Trade dress (§ 43(a) of the Lanham Act): potentially perpetual protection as long as the design is used and remains distinctive, but requires proof that the design has acquired secondary meaning (consumers associate it with your brand), and proof that it is non-functional. Trade dress is harder to establish but can last indefinitely, making it better for long-term brand protection. The strategic approach for valuable product designs: file a design patent immediately (no need to prove distinctiveness), and simultaneously build trade dress rights through use and enforcement. When the design patent expires in 15 years, the trade dress may survive. Apple does exactly this with iPhone hardware and iOS interface designs.