Patents by Inventor David A. Citron

David A. Citron has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130066975
    Abstract: Techniques for sharing of items from online storage (e.g., cloud storage) are described herein. In some embodiments, sharing links can be configured as group opt-in links designed to provide recipients with an option to join a group having permissions on a corresponding shared item. A sharing link to an item may be generated and provided to a user for distribution to recipients in various ways. When selected by recipients, the sharing link causes an option to be exposed to the recipients to opt-in to a group having permissions on a corresponding item. Group membership is determined by recipients that exercise the option and recipients that opt-in are granted permissions on the item established for the group. Subsequently, an owner of the item/group may view a list of recipients who have opted-in as members and manage corresponding permissions on an individual basis.
    Type: Application
    Filed: September 8, 2011
    Publication date: March 14, 2013
    Applicant: Microsoft Corporation
    Inventors: Arcadiy G. Kantor, Jonathan A. Bockelman, Jeffrey E. Steinbok, Sarah M. Filman, David A. Citron
  • Publication number: 20130012659
    Abstract: A lubricant component is a copolymer of ethylene and ?-olefins made by forming a series of ?-olefins by oligomerization of ethylene using an oligomerization catalyst, and then copolymerizing the ?-olefins and ethylene using a transition metalcontaining polymerization catalyst. The copolymer, which often has a high Viscosity Index, may be used, for example, in a lubricant as the base oil or a viscosity index modifier. The polyolefin may also be a component of a lubricant additive, meant to be added to an already formulated lubricant to improve the lubricant's properties.
    Type: Application
    Filed: March 28, 2011
    Publication date: January 10, 2013
    Applicant: E I Dupont De Nemours and Company
    Inventor: Joel David Citron
  • Publication number: 20120309916
    Abstract: An ethylene oligomerization catalyst that oligmerizes ethylene to a series of ?-olefins and that has a Schulz-Flory constant of about 0.75 to 0.995 produces a stream of ?-olefins. This stream is then added to a vessel containing ethylene and a copolymerization catalyst that copolymerizes ethylene and ?-olefins. The resulting branched polyethylene often has good processing properties. The good processing is presumably due to the presence of “long chain branching”. Such polymers are useful for films and other packaging materials, and for molding resins for molding parts such as industrial, automotive or electrical parts.
    Type: Application
    Filed: March 28, 2011
    Publication date: December 6, 2012
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventor: Joel David Citron
  • Publication number: 20120309915
    Abstract: A polymerization to form a branched polyolefin, in which polymerization an ethylene copolymerization catalyst and an ethylene oligomerization catalyst form a series of ethylene oligomers that are ?-olefins are both present, gives an improved polyethylene if the oligomerization catalyst has a to relatively high Schulz-Flory constant.
    Type: Application
    Filed: March 28, 2011
    Publication date: December 6, 2012
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Joel David Citron, Alex Sergey Ionkin
  • Publication number: 20120302809
    Abstract: Higher molecular weight linear ?-olefins are produced by the oligomerization of ethylene using certain iron complexes of 2,6-diacylpyridinedimimines or 2,6-pyridinedicarboxaldehydedimines as catalysts. These iron complexes are more sterically hindered than those heretofore used. The resulting ?-olefins are useful as comonomers in olefin polymerizations.
    Type: Application
    Filed: March 28, 2011
    Publication date: November 29, 2012
    Applicant: E.I. Dupont De Nemours and Company
    Inventors: Joel David Citron, Alex Sergey Ionkin
  • Publication number: 20120271014
    Abstract: A polymerization process for copolymerizing ethylene and a series of ?-olefins to form a branched polyethylene, in which the series of ?-olefins is generated in-situ by an ethylene oligomerization catalyst, is improved if the oligomerization catalyst has a Schulz-Flory constant of about 0.30 to about 0.55. This makes very little higher molecular weight ?-olefins, which allows for easy removal of unpolymerized ?-olefins from the polyolefin product.
    Type: Application
    Filed: August 17, 2010
    Publication date: October 25, 2012
    Applicant: E.I.DuPont De Nemours and Company
    Inventor: Joel David Citron
  • Publication number: 20120157686
    Abstract: In an ?-olefin manufacturing process by the oligomerization of ethylene using an iron complex of a diimine of a 2,6-diacylpyridine or a 2,6-pyridinecarboxaldehyde, in which certain substituted iminoaryl groups are present, less higher molecular weight unwanted products are produced when the diimine and/or its precursor arylamine does not have impurities with substitution on a second ortho position to the imino group. This leads to less fouling of the process apparatus and higher yields of desired ?-olefins.
    Type: Application
    Filed: August 17, 2010
    Publication date: June 21, 2012
    Applicant: E. I. Du Pont De Nemours And Company
    Inventor: Joel David Citron
  • Publication number: 20110276897
    Abstract: Collaborating on documents by e-mail may be streamlined into a unified process. In one example, a user creates a document in an online document service, and sends the document to collaborators by mailing a link to the document. The document may have permissions set so that the creator of the document, and any user on the e-mail distribution list, can read and edit the document. When a user receives the e-mail, that user may open and edit the document. Upon closing the editing application, the user may be presented with an appropriate interface to create a reply e-mail.
    Type: Application
    Filed: May 7, 2010
    Publication date: November 10, 2011
    Applicant: MICROSOFT CORPORATION
    Inventors: Daniel W. Crevier, Jason F. Moore, David Citron, Jennifer I. Shen, Gareth A. Howell, Jonathan A. Bockelman
  • Patent number: 7977268
    Abstract: Mixtures of different polyolefins may be made by direct, preferably simultaneous, polymerization of one or more polymerizable olefins using two or more transition metal containing active polymerization catalyst systems, at least one of which contains cobalt or iron complexed with selected ligands. The polyolefin products may have polymers that vary in molecular weight, molecular weight distribution, crystallinity, or other factors, and are useful as molding resins and for films.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: July 12, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joel David Citron, Lin Wang
  • Publication number: 20110130528
    Abstract: Mixtures of different polyolefins may be made by direct, preferably simultaneous, polymerization of one or more polymerizable olefins using two or more transition metal containing active polymerization catalyst systems, at least one of which contains cobalt or iron complexed with selected ligands. The polyolefin products may have polymers that vary in molecular weight, molecular weight distribution, crystallinity, or other factors, and are useful as molding resins and for films.
    Type: Application
    Filed: January 28, 2011
    Publication date: June 2, 2011
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: ALISON MARGARET ANNE BENNETT, Edward Bryan Coughlin, Joel David Citron, Lin Wanc
  • Patent number: 7906451
    Abstract: Catalysts for the polymerization of olefins are provided. The catalysts comprise: (a) a first active polymerization catalyst which is a Fe or Co complex of a ligand of the formula: wherein: R1, R2 and R3 are each independently hydrogen, hydrocarbyl, substituted hydrocarbyl, or an inert functional group; R4 and R5 are each independently hydrogen, hydrocarbyl, an inert functional group or substituted hydrocarbyl; and R6 and R7 are aryl or substituted aryl; and (b) a second active polymerization catalyst which contains one or more transition metals; and (c) a catalyst support.
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: March 15, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Joel David Citron, Lin Wang
  • Publication number: 20100324237
    Abstract: Mixtures of different polyolefins may be made by direct, preferably simultaneous, polymerization of one or more polymerizable olefins using two or more transition metal containing active polymerization catalyst systems, at least one of which contains cobalt or iron complexed with selected ligands. The polyolefin products may have polymers that vary in molecular weight, molecular weight distribution, crystallinity, or other factors, and are useful as molding resins and for films.
    Type: Application
    Filed: August 6, 2010
    Publication date: December 23, 2010
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Alison Margaret Anne Bennett, Edward Bryan Coughlin, Joel David Citron, Lin Wang
  • Publication number: 20100192211
    Abstract: Techniques are described to provide revocable object access. In an implementation, a user may provide content and an object (e.g., a picture) to be published with the content. The object is uploaded to a storage location, and a uniform resource locator (URL) that includes a token is generated for the object. The token is registered in an access control list (ACL), and token permission settings in the ACL are utilized to control access to the object. The URL may be embedded in the content. When a viewer requests the content, the object may be retrieved from the storage location using the URL. The user may revoke access to the object by changing the token permission settings in the ACL.
    Type: Application
    Filed: January 26, 2009
    Publication date: July 29, 2010
    Applicant: Microsoft Corporation
    Inventors: Joseph Andrew Bono, Jeffrey E. Steinbok, Brian M. Perrin, Rebecca L. Pezely, Eileen S. Hash, Gyorgy K. Schadt, David A. Citron, Jonathan A. Bockelman, Daniel W. Crevier, Michael F. Matsel, Amy J. Beauford, Shabbir A. Shahpurwala
  • Patent number: 7627600
    Abstract: Methods and systems are provided for managing, compiling, and displaying unpredictable digital content received from a plurality of sources, such as news information transmitted in RSS feeds. A layout may be selected from multiple display templates, each having slots for the segments of media that are received. Selection of the templates may be based on the properties of the segments. Further systems and methods are directed to displaying at least a portion of non-textual digital content, such as video and pictures, in a nested view designated for the non-textual graphical content. In one example, the portion of non-textual digital content presented in the nested view is determined by the properties of the non-textual digital content. In other instances, the quantity of the non-textual data may determine what portion is displayed in the nested view.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: December 1, 2009
    Assignee: Microsoft Corporation
    Inventors: David Citron, Giampiero M. Sierra, Martin Van Tilburg, Jeffrey J. Weir, Orry Soegiono, Ben Constable, Colin Anthony, David Stewart, David Zearing
  • Publication number: 20090043813
    Abstract: Functionality is described for creating objects that represent respective items provided in a store. The objects can be embedded in various hosts, such as network-accessible pages (e.g., web pages), network-accessible journals (e.g., blogs), messages (e.g., Emails), and so on. Consumers can activate the objects in the hosts to retrieve information associated with the corresponding items. According to one illustrative feature, the functionality provides a general interface for creating objects for different types of items stored in the store, including file items of various kinds (e.g., text files, image files, audio files, spreadsheet files, video files, etc.), list items, folder items, and so on. According to another illustrative feature, the functionality provides an interface for allowing users to customize various aspects of objects.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 12, 2009
    Applicant: Microsoft Corporation
    Inventors: Jason F. Moore, David Citron
  • Publication number: 20070294238
    Abstract: Methods and systems are provided for managing, compiling, and displaying unpredictable digital content received from a plurality of sources, such as news information transmitted in RSS feeds. A layout may be selected from multiple display templates, each having slots for the segments of media that are received. Selection of the templates may be based on the properties of the segments. Further systems and methods are directed to displaying at least a portion of non-textual digital content, such as video and pictures, in a nested view designated for the non-textual graphical content. In one example, the portion of non-textual digital content presented in the nested view is determined by the properties of the non-textual digital content. In other instances, the quantity of the non-textual data may determine what portion is displayed in the nested view.
    Type: Application
    Filed: June 20, 2006
    Publication date: December 20, 2007
    Applicant: MICROSOFT CORPORATION
    Inventors: David Citron, Giampiero M. Sierra, Martin Van Tilburg, Jeffrey J. Weir, Orry Soegiono, Ben Constable, Colin Anthony, David Stewart, David Zearing
  • Patent number: 7148175
    Abstract: A polymerization catalyst system, containing a specified ratio of two iron complexes of a bisimine of 2,6-diacylpyridine or a bisimine of a 2,6-pyridinedicarboxaldehyde which produce polyolefins of differing molecular weights, is useful for producing polyolefins, especially polyethylenes, which are particularly useful for blow molding.
    Type: Grant
    Filed: January 7, 2003
    Date of Patent: December 12, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Joel David Citron
  • Patent number: 6960712
    Abstract: Drumsticks made from thermoplastic or thermoset resin compositions containing a reinforcing agent and having certain physical properties are readily formed, have good playing characteristics, and are durable.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: November 1, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joel David Citron, Michael Robert Samuels
  • Patent number: 6921795
    Abstract: Blends of two or more polyethylenes are made by reacting ethylene with an oligomerization catalyst that forms ?-olefins, and two polymerization catalysts, one of which under the process conditions copolymerizes ethylene and ?-olefins, and the other of which under process conditions does not readily copolymerize ethylene and ?-olefins. The blends may have improved physical properties and/or processing characteristics.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: July 26, 2005
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Lin Wang, Maria Spinu, Joel David Citron
  • Patent number: 6861545
    Abstract: Higher trialkylaluminum compounds may be made by forming ?-olefin by oligomerizing ethylene using a transition metal containing catalyst, reacting the ?-olefins formed with a lower trialkylaluminum compound to form higher trialkylaluminum compound(s) These may optionally be oxidized, as with oxygen, to form higher trialkoxyaluminum compound, which in turn may be hydrolyzed to ?-alcohols. In one variation of the process lower ?-olefins and higher (relatively) ?-alcohols may be formed and isolated. Higher trialkylaluminum compounds and ?-alcohols are useful as chemical intermediates, while lower ?-olefins are useful as monomers for polyolefins.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: March 1, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Joel David Citron