Company patents

Covestro LLC

Covestro LLC's patent strategy reveals a surprising shift away from its core Polymer Synthesis (Polycondensation) and Polymer Working & Compounding categories, which represent 63.2% and 35.9% of its portfolio respectively, both experiencing significant declines of -19.0% and -30.8% in 2025. While most categories show a general decline in 2026 so far, the company saw a notable emerging focus in Polymer Synthesis (Polymerization) and Polymer Additives, both growing by +200.0% in 2025, and Coating Compositions (Paints, Inks) with a +133.3% growth in 2025, indicating a dynamic re-evaluation of its material science priorities.

Patent Trend by Technology Area

Yearly patent publications since 2023

Product themes

Product-level themes inferred from filings since 2023, with category chips showing where each theme appears. Select a theme to filter the patents below.

117 US filings (since 2023) · 12 categories · 22 themes

Urethane/Urea Polymerization

Methods for synthesizing polyurethanes and polyureas, including non-isocyanate routes, using various monomers, catalysts, and curing agents, often for foams, coatings, or adhesives.

Polymer Synthesis (Polycondensation)
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66since 2023
-25.0%YoY
Polymer Composites with Functional Fillers

Polymer compositions incorporating inorganic or organic filler materials to impart specific functional properties such as thermal conductivity, flame retardancy, electrical conductivity, or enhanced mechanical strength and dimensional stability.

Polymer Working & CompoundingPolymer CompositionsPolymer Synthesis (Polymerization)Polymer AdditivesCoating Compositions (Paints, Inks)
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41since 2023
0.0%YoY
Advanced Curing Chemistries

Novel formulations and mechanisms for initiating or controlling the polymerization and cross-linking of adhesives, including dual-curing systems, radical polymerization, and partial curing for tailored material properties.

Coating Compositions (Paints, Inks)Adhesives
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22since 2023
0.0%YoY
Functionalized Polysiloxanes

Synthesis and modification of polysiloxane polymers to introduce specific functional groups or structures, enhancing properties for applications like composites, coatings, biomedical uses, or powder treatment.

Polymer Synthesis (Polycondensation)
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21since 2023
+400.0%YoY
Functional Coatings and Surface Modifiers

Additives or compositions specifically formulated for surface application or modification to impart protective, decorative, or specialized functional properties to polymer products.

Coating Compositions (Paints, Inks)Polymer Additives
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13since 2023
+250.0%YoY
Sustainable Polymer Materials

Development and application of polymer compositions designed for reprocessability, recyclability, or incorporating sustainable additives, often featuring reversible bonds or bio-based components.

Polymer Synthesis (Polycondensation)Polymer Working & CompoundingPolymer AdditivesPlastics Shaping & Molding
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11since 2023
-60.0%YoY
High-Performance Thermally Stable Resins

Polymer compositions engineered for enhanced heat resistance, thermal stability in molten states, or improved processability at high temperatures, often involving specific copolymers, blends, or stabilizing additives for applications in electronics or automotive.

Polymer Compositions
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10since 2023
-75.0%YoY
Advanced Polymerization Processes

Novel methods and reactor designs for polymer synthesis, focusing on improving efficiency, achieving continuous production, or controlling specific polymer architectures and product morphologies like particle size or sheet formation.

Polymer Synthesis (Polymerization)
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8since 2023
+33.3%YoY
Catalytic Olefin Polymerization

Methods and catalyst systems, often supported (e.g., on silica or alumina), for the synthesis of polyolefins like polyethylene and polypropylene, focusing on controlling molecular weight, distribution, and polymer morphology.

Polymer Synthesis (Polymerization)
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7since 2023
-33.3%YoY
Advanced Thermoplastic Synthesis

Synthesis and modification of high-performance thermoplastic polymers, such as poly(arylene ether ketone) (PAEK) or polycarbonates, to achieve enhanced thermal stability, mechanical strength, or specific processing characteristics.

Polymer Synthesis (Polycondensation)
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7since 2023
-66.7%YoY
Multi-material Product Integration & Finishing

Techniques for combining multiple materials or layers, often with specialized surface treatments, coatings, or assembly methods, to create functional or aesthetically enhanced plastic articles, including consumer goods and encapsulated electronics.

Plastics Shaping & Molding
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5since 2023
-50.0%YoY
Polymers for Electronic Devices

Synthesis and formulation of polymers, such as epoxy resins, polyimides, or ionic binders, tailored for specific functions in electronic components like sealing, insulation, or energy storage.

Polymer Synthesis (Polycondensation)
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4since 2023
n/a
Sustainable & Reversible Adhesives

Adhesive technologies focused on environmental benefits such as biodegradability, natural origin, or designed for easy debonding and re-bonding to facilitate recycling, reuse, or specific application needs.

Adhesives
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4since 2023
n/a
Photopolymerization for Device Fabrication

Light-initiated polymerization processes used to create structures, coatings, or components, particularly for electronic devices, displays, or additive manufacturing, often involving photoinitiators and specific monomer/oligomer compositions.

Polymer Synthesis (Polymerization)
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3since 2023
n/a
Hot-Melt Adhesive Formulations

Development of adhesive compositions that are applied in a molten state and solidify upon cooling, focusing on specific polymer blends, additives, and their resulting mechanical or optical properties.

Adhesives
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3since 2023
n/a
Reactor System Design & Optimizationfiltered

Engineering approaches to improve the efficiency, control, and performance of chemical reactors, encompassing continuous processes, heat exchange integration, and specialized reactor configurations for various chemical transformations.

Catalysts & Reactors
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2since 2023
n/a
Thermoplastic Compression Molding

Processes involving the application of heat and pressure to shape thermoplastic or elastomeric materials, often using molds or presses, to achieve specific forms or material properties.

Plastics Shaping & Molding
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1since 2023
new
Phenolic Epoxy Resins

Synthesis and formulation of epoxy resins, often derived from phenolic precursors like cardanol and vanillin, for applications requiring specific thermal, mechanical, or electrical properties.

Polymer Synthesis (Polycondensation)
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1since 2023
n/a
Elastomer Formulations for Performance

Development of rubber and elastomer compositions, often involving specific polymer blends, additives (e.g., process oils, reinforcing agents), and cure packages, to achieve desired mechanical properties like abrasion resistance, wet grip, shear durability, or flexibility for demanding applications.

Polymer Compositions
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1since 2023
n/a
Fiber Composite Layup & Curing

Methods and tooling for forming structural components from fibrous materials impregnated with resin, involving processes like prepreg handling, resin infusion, and co-bonding during curing.

Plastics Shaping & Molding
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1since 2023
n/a
High-Barrier Packaging Films

Multi-layer polymer films engineered to provide superior barrier properties against gases (e.g., oxygen), moisture, or aromas, often incorporating heat-sealing or resealing mechanisms for food and product preservation.

Layered Products (Laminates, Films)
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1since 2023
n/a
Gas Stream Purification

Technologies and systems for removing unwanted components or separating desired gases from a mixed gas stream, including adsorption, absorption, and membrane-based methods.

Separation Processes (Filtration, Distillation)
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1since 2023
n/a

Patents

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US 11702381 B1GRANTED
B01D3/42

Method for operating a rectification column

Filed:2022-02-23Pub:2023-07-18
Applicant:Covestro Deutschland AG

The present invention provides a method for operating a rectification column ( 1000 ) for separating a mixture (S) containing a component A and a component B having a boiling point higher than that of the component A at an operating pressure of the rectification column ( 1000 ) which is lower than ambient pressure, wherein the method comprises a step for controlling the mass fraction of the component B in the product stream of the component A (P 1 ) to a value within a first target range from 0.1% to 5.0% and the mass fraction of the component A in the product stream of the component B (P 2 ) to a value within a second target range from 0.1% to 5.0%, wherein the control is carried out as a function of a controlling temperature (TC) for which a setpoint TC setpoint is calculated according to the equation TC setpoint =T2+F·(T1−T2), where F is a factor which is in the range from 0.1 to 0.9 and T1 and T2 are reference temperatures, wherein in the case of a deviation in the measured control temperature (TC) from its setpoint TC setpoint being found the control temperature (TC) is readjusted to the setpoint TC setpoint by varying one or more of the following actuating variables: (i) heating of the column bottom ( 130 ) by the evaporator ( 200 ), (ii) the mass flow {dot over (m)} A42 of the reflux (A 42 ) fed back into the rectification column, (iii) the mass flow {dot over (m)} P2 of the product stream P 2 and (iv) the mass flow {dot over (m)} P1 of the product stream P 1.