A barrel of motor oil and a scented home candle live in the same trademark class. That surprises almost everyone the first time they hear it, but the logic is functional rather than commercial: Nice Class 4 groups anything that fuels or illuminates, a definition old enough to predate the entire modern candle industry it now also happens to cover. For a modern brand, Class 4 really has two separate centers of gravity — industrial energy and lubricants on one side, the booming home-fragrance candle market on the other — and they barely overlap in practice.
Everything Inside Class 4
- Industrial oils, greases, and lubricants
- Motor fuels, petrol, diesel, and biofuels
- Solid fuels such as coal, charcoal, and firewood
- Candles, tea lights, and wicks for lighting
- Dust-absorbing, wetting, and binding compositions
- Illuminants and lamp oils
- Electrical energy as a product, in some cases
What falls outside is just as important: raw industrial chemicals are Class 1, cosmetic, massage, and essential oils applied to the body are Class 3, and fuel-dispensing or energy services may sit in Class 35, 37, or 40 rather than Class 4 at all. A scented candle is Class 4, but a massage oil is Class 3 — the difference is whether the product fuels and illuminates, or is applied to the body.
Essential oils split by purpose, not ingredient: the same oil used as a cosmetic or fragrance for the body is Class 3, but a candle scented with that oil is Class 4. A home-fragrance brand selling both candles and body products needs both classes.
The Candle Market's Quiet Revival of a Sleepy Class
For decades, Class 4 was the territory of petroleum and lubricant giants — Shell and ExxonMobil on the fuel side, Castrol and Mobil 1 in motor oil. The explosion of the premium home-fragrance and candle market, led by names like Yankee Candle and Bath & Body Works, has brought a wave of new filings from small and direct-to-consumer brands that never touch a barrel of oil. Because the candle space has crowded quickly, distinctiveness and clearance now matter here as much as in any consumer class.
Candle founders gravitate to descriptive, scent-led names — "Vanilla Glow," "Lavender Dreams" — that struggle to register because they describe the product rather than identify its source. A distinctive, arbitrary, or coined name clears far more easily and gives the company something it can actually enforce against the copycats that flood the category every season. Because candles are visual, shelf-presence products, some brands invest in distinctive vessel shapes and labels too, which can over time support trade-dress protection alongside the core wordmark.
Filing the Full Range: Candles, Body Products, Retail
For a brand that spans both candles and body or fragrance products, the cleanest approach is to map each product to its class from the outset: candles and lamp oils in Class 4, cosmetic and body fragrances in Class 3, and the retail or online-store operation in Class 35. Filing this way avoids the common gap where a fast-growing fragrance brand discovers, after launch, that half its range sits outside the single class it originally registered.
Frequently Asked Questions
Why are candles and motor oil in the same class?
Because Nice Class 4 is defined around fuels and illuminants — materials that burn, lubricate, or give light. Candles and motor oil both fall under that functional umbrella despite being very different consumer products.
Are scented candles in Class 4 or Class 3?
Scented candles are Class 4 as illuminants. Class 3 covers cosmetic and fragrance products applied to the body, plus some home fragrances positioned as cosmetics. A home-fragrance brand selling candles and body products typically files both.
Where do essential oils go?
It depends on use — a cosmetic or body-fragrance oil is Class 3, while an oil used as a candle scent relates to Class 4. Brands selling oils across uses should map each product carefully.
What class are fuels and lubricants in?
Motor fuels, petrol, diesel, biofuels, industrial oils, and lubricants are all Class 4. The raw chemicals used to make them are Class 1.
From industrial lubricants to a crowded candle market, Class 4 spans two very different worlds, and clearance matters in both. Use tmarkmetric to browse registered Class 4 trademarks and search the broader registry before you commit to a product line or label.