| Patent application number | Description | Published |
|---|
| 20090100553 | SCANNING PROBE-BASED LITHOGRAPHY METHOD - A resist medium in which features are lithographically produced by scanning a surface of the medium with an AFM probe positioned in contact therewith. The resist medium comprises a substrate; and a polymer resist layer within which features are produced by mechanical action of the probe. The polymer contains thermally reversible crosslinkages. Also disclosed are methods that generally includes scanning a surface of the polymer resist layer with an AFM probe positioned in contact with the resist layer, wherein heating the probe and a squashing-type mechanical action of the probe produces features in the layer by thermally reversing the crosslinkages. | 04-16-2009 |
| 20100280242 | Method of Preparing Cyclic Carbonates, Cyclic Carbamates, Cyclic Ureas, Cyclic Thiocarbonates, Cyclic Thiocarbamates, and Cyclic Dithiocarbonates - A method of preparing a cyclic monomer, comprising: forming a first mixture comprising a precursor compound, bis(pentafluorophenyl) carbonate, and a catalyst; wherein the precursor compound has a structure comprising a) two or more carbons, and b) two functional groups selected from the group consisting of primary amine, secondary amine, thiol group, hydroxyl group, and combinations thereof; and agitating the first mixture at a temperature effective to form a second mixture comprising the cyclic monomer, the cyclic monomer selected from the group consisting of a cyclic carbonate, a cyclic carbamate, a cyclic urea, a cyclic thiocarbonate, a cyclic thiocarbamate, and a cyclic dithiocarbonate. | 11-04-2010 |
| 20100305281 | POLYMERS BEARING PENDANT PENTAFLUOROPHENYL ESTER GROUPS, AND METHODS OF SYNTHESIS AND FUNCTIONALIZATION THEREOF - A one pot method of preparing cyclic carbonyl compounds comprising an active pendant pentafluorophenyl ester group is disclosed. The cyclic carbonyl compounds can be polymerized by ring opening methods to form ROP polymers comprising repeat units comprising a side chain pentafluorophenyl ester group. Using a suitable nucleophile, the pendant pentafluorophenyl ester group can be selectively transformed into a variety of other functional groups before or after the ring opening polymerization. | 12-02-2010 |
| 20100305300 | Method of Ring-Opening Polymerization, and Related Compositions and Articles - Methods to form a polymer by ring-opening polymerization include reacting, a mixture comprising a monomer, an accelerator, an initiator, and a catalyst comprising a 1,1,1,3,3,3-hexafluoropropan-2-ol-2-yl group to form the polymer. Also disclosed are polymers including a residual amount of the catalyst in an amount greater than 0 weight percent. | 12-02-2010 |
| 20100311917 | METHODS FOR MAKING MULTI-BRANCHED POLYMERS - A method for making a multi-branched polymer includes reacting a first polymeric unit with a functional cyclic compound to form a functional macroinitiator compound with a cyclic moiety. The functional macroinitiator compound is reacted with an amine functional compound to open the cyclic moiety and form a first functional group and a second functional group. To form the branched polymer, at least one of a second polymeric unit is propagated from the first functional group and a third polymeric unit is propagated from the second functional group. | 12-09-2010 |
| 20110020533 | SCANNING PROBE-BASED LITHOGRAPHY METHOD - A resist medium in which features are lithographically produced by scanning a surface of the medium with an AFM probe positioned in contact therewith. The resist medium comprises a substrate; and a polymer resist layer within which features are produced by mechanical action of the probe. The polymer contains thermally reversible crosslinkages. Also disclosed are methods that generally includes scanning a surface of the polymer resist layer with an AFM probe positioned in contact with the resist layer, wherein heating the probe and a squashing-type mechanical action of the probe produces features in the layer by thermally reversing the crosslinkages. | 01-27-2011 |
| 20110182996 | SURFACE MODIFIED NANOPARTICLES, METHODS OF THEIR PREPARATION, AND USES THEREOF FOR GENE AND DRUG DELIVERY - A composition comprises a surface modified nanoparticle comprising a core comprising a material selected from the group consisting of organic materials, organometallic materials, inorganic materials, metals, metal oxides, and combinations thereof; and a surface branch covalently linked to the core having the general formula (3): | 07-28-2011 |
| 20110243848 | STAR POLYMERS, METHODS OF PREPARATION THEREOF, AND USES THEREOF - A composition of matter comprising an amphiphilic star polymer, the star polymer comprising a crosslinked microgel core and 6 or more independent polymer arms covalently linked to the core, the 6 or more arms each comprising a hydrophilic polymer chain segment and a hydrophobic polymer chain segment; wherein each individual metal selected from the group consisting of beryllium, magnesium, calcium, strontium, barium, radium, aluminum, gallium, indium, thallium, germanium, tin, lead, arsenic, antimony, bismuth, tellurium, polonium, and metals of Groups 3 to 12 of the Periodic Table has a concentration in the star polymer of greater than or equal to 0 parts per million and less than or equal to 100 parts per million. | 10-06-2011 |
