Mège-Mouriès' 'Improvement in Treating Animal Fats' Patent US146012A, Read Back 153 Years After the Napoleon III Open Call
About these "memos": Memos in this series record a candidate at the stage where the primary-source URL has been verified. This memo retrieved Claim 1, inventor, dates, and assignee from Google Patents, but the full specification (the nine-step process detail, reaction conditions, yield data, and drawings) has not been read end-to-end. Confirmed facts only; inferences are flagged as such.
Why dig here
The global margarine market is on the order of 11 million tonnes/year (FAO estimate, secondary). The starting point is 1869: Napoleon III, in the late period of the Second French Empire, opened a public call for an affordable, shelf-stable butter substitute for the army and the working poor. Hippolyte Mège-Mouriès — a pharmacist and food chemist — answered the call by developing a process that turns beef fat into "oleomargarine" via pepsin digestion and crystal separation. This memo treats the US patent US146012A, the 1873 US re-filing of his 1869 French patent. The point of the dig is to read margarine as a 19th-century invention born of welfare policy and military logistics.
DB correction: the substantive primary source is US146012A
The candidates.tsv-listed URL was https://patents.google.com/patent/US119428, which is the September 26, 1871 John F. Taylor "Improvement in feed-water heaters for steam-boilers" patent — entirely unrelated to margarine. The substantive primary source is US146012A "Improvement in Treating Animal Fats" (granted Dec 30 1873; Hippolyte Mège, of Paris, France).
This continues the streak of DB-number errors at Day 8 IC-009 / IC-011 / IC-012, Day 9 PH-001 (statins), and Day 13 FH-006 (MSG; the listed URL returned 404). And in this Day 14 alone, two DB-number errors occurred — episode 54 (cisplatin: US4169726 → US4310515A) and this episode 56 (margarine: US119428 → US146012A). Cumulative DB corrections from Day 8 through Day 14 reach 15.
Patent essentials
- Patent: US146012A
- Title: Improvement in Treating Animal Fats
- Filed: 1873-11-01
- Granted: 1873-12-30
- Inventor: Hippolyte Mège (of Paris, France; also known as Hippolyte Mège-Mouriès), sole
- Original assignee: None recorded (held personally)
- French parent patent: French Patent No. 86480, granted July 15, 1869 (referenced in the specification but not retrieved here)
- Primary source: Google Patents (URL confirmed; Claim 1 retrieved)
Claim 1 (verbatim)
The improved material herein described, produced by treating animal fats so as to remove the tissues and other portions named, with or without the addition of substances to change the flavor, consistency, or color, as set forth.
The claim is for "the improved material … produced by treating animal fats to remove tissue and other named portions, with or without added substances for flavor, consistency, or color, as set forth in the specification." The specification describes a nine-step process (summary):
- Neutralizing ferments in beef fat
- Mechanically crushing fat cells
- Concentrated digestion using artificial gastric juice (pepsin)
- Crystallization separating stearin (solid) and oleomargarine (semi-solid)
- Centrifugal separation
- Conversion of oleomargarine into a butter-like material via mammary pepsin
- Processing stearin into superior stearic acid for candle-making
The throughline is "industrially reproduce the physiological process by which a cow's mammary gland turns fat into butter." The process mobilizes the chemistry available in 1869 — digestive enzymes, crystallization, centrifuging — as a single integrated workflow.
The Napoleon III open call and the 1869 French patent
| Year | Event | Source type |
|---|---|---|
| 1869 | Napoleon III opens a public call for an affordable butter substitute (army / working class) | Secondary (Wikipedia / French food history) |
| 1869-07-15 | Mège-Mouriès wins French Patent 86480 (referenced in the US146012A specification) | Primary (referenced in the US patent) |
| 1870–1871 | Franco-Prussian War, Paris Commune, Napoleon III deposed, Second Empire collapses | Secondary (French political history) |
| 1873-11-01 | Mège-Mouriès files US patent US146012A | Primary (Google Patents) |
| 1873-12-30 | US146012A granted (under sixty days from filing — exceptionally fast) | Primary (Google Patents) |
| 1873– | Dutch and US food companies (forerunners of Unilever's lineage among them) take licenses from Mège-Mouriès | Secondary (industry history) |
| 1880 | Mège-Mouriès dies in Paris | Secondary (biography) |
The US filing is post-Empire. The political motivation behind the original public call (Napoleon III's welfare policy) had already evaporated by 1871, but patent law continued to operate independently. The relationship between the post-Empire political context and Mège-Mouriès' patent strategy is left as inference here.
Modern resonance
| US146012A (1873) | Modern (2026) | Verdict |
|---|---|---|
| Convert beef fat into a butter-like material via artificial pepsin digestion | Plant-based margarine — partial hydrogenation up to the 2010s, then transesterification after trans-fat regulation | Metaphor (the "industrial alternative-fat production" framing carries forward; the chemistry pathway is different) |
| Napoleon III public call → individual invention → industrial commercialization | Modern public R&D calls (DARPA, JST CREST, EU Horizon) → university spinout → commercialization | Similar (a 19th-century ancestor of the public-call-to-private-invention model) |
| Reproducing the cow's mammary gland industrially | Cell-cultured meat (Upside Foods, Eat Just), precision fermentation (Perfect Day for animal-protein analogs) | Metaphor (the lineage is "make animal-origin foods outside the animal"; the technology is unrelated) |
| Nine-step combined-process patent | Modern food-process patents that combine high-pressure processing, enzymes, supercritical extraction, etc. | Similar (compound-process drafting design) |
| "Affordable butter substitute" for army and working poor | Modern food-security policy (climate-resilient food, alternative protein), fortified foods for developing countries | Metaphor (the 19th-century welfare-policy and modern food-policy frames are different) |
Pitfalls
Pitfall 1: limit the "world's first" claim Mège-Mouriès' patent is widely cited as the "world's first margarine patent," but that refers specifically to the French patent of July 1869. The US patent treated here, US146012A, is the December 1873 US re-filing. Don't conflate them.
Pitfall 2: separate "1869 invention" and "1873 US patent" DB entries and general food-history texts often write only "invented 1869." But the US patent number US146012A grants in 1873. Three layers — invention (1869), French patent (1869), US patent (1873) — should be tracked separately.
Pitfall 3: etymology of "margarine" "Margarine" derives from "margaric acid" (1813, Chevreul), a fatty-acid term. Mège-Mouriès named his product "oleomargarine"; the shortened form "margarine" came later. The US specification uses "oleomargarine."
Pitfall 4: don't conflate with trans-fat issues This patent's process is 1873 animal-fat (beef-tallow) processing, technically separate from 20th-century partial hydrogenation of vegetable oils (which generates trans fats). The trans-fat debate of the 1990s onward is outside the scope of this patent.
Open items
- Full specification, including the nine-step process detail, reaction conditions, yield data, and drawings
- Original French Patent 86480 (1869)
- The Napoleon III public-call official document (criteria, prize amount, judging committee)
- Post-1873 US-margarine-market license royalties and follow-on patents
- Forward-citation count and links to modern margarine patents
- Mège-Mouriès' other patents (food preservation, bread-making, etc.)
Next moves
When this gets upgraded from memo to note, retrieve (a) the full specification and the nine-step process detail, (b) the original French Patent 86480, (c) the Napoleon III public-call official document, (d) the IP-succession chain into late-19th-century margarine industrialization (Unilever-lineage forerunners), (e) the relationship between the 1886 US Oleomargarine Act (federal taxation) and this patent — to map 150 years of margarine industrialization. Read alongside Day 14's ep54 (cisplatin formulation patent US4310515A) and ep55 (Flavr Savr DNA patent US4801540A), this becomes a useful three-step comparison of how food and pharma claim drafting evolved across the 19th century, the late 20th century, and the end of the 20th century.
References:
- Original patent: US146012 on Google Patents
- Food & Health Patents Note #4: Aspartame US3492131A
- Food & Health Patents Memo #4: Teflon US2230654A
- Food & Health Patents Memo #5: MSG commercial patent US1015891A
- Food & Health Patents Memo #6: Flavr Savr GMO tomato US4801540A
- Wikipedia: Margarine (https://en.wikipedia.org/wiki/Margarine)
- Wikipedia: Hippolyte Mège-Mouriès (https://en.wikipedia.org/wiki/Hippolyte_M%C3%A8ge-Mouri%C3%A8s)