Joseph Aspdin patents Portland cement
- When
- 1824
- Where
- Leeds, Yorkshire
- Episodes
- 1
Joseph Aspdin, an English bricklayer from Leeds, obtained a patent for an artificial stone in 1824. He named the product Portland cement due to its resemblance to Portland stone. The patent, granted on 21 October 1824, marked a significant step in cement development, though the product differed from modern formulations.
Episodes
Background and detail
Background. Joseph Aspdin was a bricklayer and stonemason living in Leeds, Yorkshire. He experimented with cement manufacture, leading to a patent for an artificial stone. The product was named Portland cement because hardened mortar resembled the fine limestone quarried on the Isle of Portland. This naming established a lasting association with the material.
Patent Details. The patent, titled An Improvement in the Mode of Producing an Artificial Stone, was granted on 21 October 1824. Aspdin coined the term Portland cement by analogy with Portland stone. The patent specification was enrolled in the High Court of Chancery in December 1824, confirming the legal status of the invention.
Historical Context. Aspdin developed his cement from other types of hydraulic lime in England in the early 19th century. His product has been called a "proto-Portland cement": it was a first step in the development of modern Portland cement, but the patent does not describe the product recognised as Portland cement today.
People involved
- Joseph Aspdin · Inventor and Patent Holder
- King George the Fourth · Granting Authority
Sources
- Joseph Aspdin Wikipedia, revision of 2026-08-29
- Portland cement Wikipedia, revision of 2026-09-19
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.