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Propylene Oxide

2-methyloxirane · also: Epihydrin · propeneoxide · Epoxypropane · Methyloxirane · epoxy-propane · propylenoxide

FormulaC3H6O
Mol. weight58.08
PubChem CID6378
InChIKeyGOOHAUXETOMSMM-UHFFFAOYSA-N
SMILESCC1CO1
123,155Patents
1,232Research papers
8,622Patents - last 3 years
10Papers - last 3 years

Who owns the IP

The organizations most actively patenting around this compound, ranked by referenced patent volume.

#AssigneePatents
1BASF SE6,741
2Dow Inc3,561
3China Petrochemical Corp2,115
4Henkel AG and Co KGaA1,739
5Procter and Gamble Co1,351
6Bayer AG1,183
7Covestro AG1,066
8LyondellBasell Industries NV991
9Evonik Industries AG918
10Corteva Inc890

Explore the full landscape

This preview shows the leading assignees. Cypris reveals the full ownership landscape - every filing entity, filing trends, and portfolio momentum.

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Where innovation is concentrated

Patent classifications ranked by volume reveal the technical domains with the most active filing.

#CodeAreaPatents
1C08GPolymers from non-vinyl bonds (e.g. polyamides, polyesters)32,268
2C08LPolymer compositions (blends)21,551
3C09DCoatings, paints, varnishes11,913
4C08KPolymer compositions (additives)11,892
5A61KMedicinal preparations11,488
6C08FPolymers from C=C unsaturated bonds10,491
7C07DHeterocyclic compounds9,888
8C08JWorking-up of plastics8,199
9C07CAcyclic and carbocyclic compounds8,048
10C11DDetergents, cleaning compositions7,311

AI mapped opportunity space

This preview shows where patent activity concentrates. Cypris maps the full classification landscape to surface technical whitespace and IP headroom.

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Representative patents

The filings that best characterise the patent activity around this compound, most-referenced first.

TitleYearAssigneeCited by
Low foaming rinse agents comprising ethylene oxide/propylene oxide block copolymer1996Ecolab Inc124
PRODUCTION OF PROPYLENE OXIDE1992Tosoh Corp118
Cosmetic or dermatological preparations based on emulsifiers which are free from ethylene oxide and propylene oxide, for the preparation of microemulsion gels2002Maxingvest AG113
Process for producing propylene oxide1997Honeywell International Inc81
Process for purifying propylene oxide2004Sumitomo Chemical Co Ltd79

How research activity has moved

Papers published per year for this compound, over the last decade of indexed records.

YearPapers
20165
20178
201813
20193
20206
20218
20228
20234
20244
20252

Who's driving the science

The most-published authors working with this compound, alongside their primary affiliations.

#AuthorAffiliationPapers
1Malcolm H. ChisholmThe Ohio State University9
2Winfried KesslerInstitute of Groundwater Ecology6
3Folke TjerneldLund University5
4R. De LisiUniversity of Palermo4
5Carmen Alvarez‐LorenzoUniversidade de Santiago de Compostela4
6Nicole BorhoUniversity of Alberta4
7J. G. FilserTechnical University of Munich4
8Siv Osterman-GolkarStockholm University4
9Vera A. SchulteRWTH Aachen University3
10Nicola MuratoreUniversity of Palermo3

Research leaders

This preview lists the top authors. Cypris surfaces the full researcher landscape, their affiliations, and how scientific influence is shifting.

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The literature that defines it

The most-cited papers anchoring the scientific record for this compound.

Frequently asked questions

Common questions about this compound's patent and research landscape, answered from the underlying data.

What is the molecular formula and canonical name of Propylene Oxide?

Propylene Oxide has the molecular formula C3H6O and a molecular weight of 58.08. Its canonical chemical name is 2-methyloxirane.

Which companies hold the most patents related to Propylene Oxide?

The top patent assignees for Propylene Oxide are BASF SE with 6,741 patents, Dow Inc with 3,561 patents, and China Petrochemical Corp with 2,115 patents. Other major assignees include Henkel AG and Co KGaA, Procter and Gamble Co, Bayer AG, Covestro AG, LyondellBasell Industries NV, Evonik Industries AG, and Corteva Inc.

How has patent activity for Propylene Oxide changed in recent years?

Patent activity has shown an increasing trend through 2023, with 5,331 patents filed that year. In 2024, there were 4,453 patents, and in 2025 (partial year), 2,273 patents were recorded. In the last 3 years, a total of 8,622 patents have been filed related to Propylene Oxide.

What are the primary technology areas associated with Propylene Oxide patents?

The largest patent classification is C08G (macromolecular compounds) with 32,268 patents, followed by C08L (compositions of macromolecular compounds) with 21,551 patents. Other significant areas include C09D (coating compositions), C08K (fillers), and A61K (pharmaceutical preparations), with 11,913, 11,892, and 11,488 patents respectively.

What notable patents exist for Propylene Oxide production and applications?

Key patents include US-5599955-A on a process for producing propylene oxide assigned to Honeywell International Inc (81 citations), JP-H04352771-A on production of propylene oxide assigned to Tosoh Corp (118 citations), and US-6736941-B2 on purifying propylene oxide assigned to Sumitomo Chemical Co Ltd (79 citations). Additionally, US-5589099-A covers low foaming rinse agents using ethylene oxide/propylene oxide block copolymer (124 citations).

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