Patents by Inventor Keith Duncan

Keith Duncan 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: 20240098117
    Abstract: A platform may receive configuration information of individual user authorizations for outbound messaging through specification of one or more authorized vendors. The platform maintains a list of the vendors and, for each vendor, a DKIM public key associated with the vendor, without publishing the public keys to a DNS, and publishes a customized SPF policy comprising a macro mechanism for identifying a particular user that transmitted a message to the DNS. The platform logs received SPF customized queries, extracts data populated by the macro mechanism from the logged queries, and analyzes the extracted data to determine a particular user associated with the query, to determine whether the user is authorized to utilize a vendor associated with the domain based on the configuration information. Responsive to the determination that the individual is authorized to utilize the vendor, the platform publishes the DKIM public key associated with the vendor to the DNS.
    Type: Application
    Filed: October 31, 2023
    Publication date: March 21, 2024
    Inventors: Keith Wayne Coleman, Richard Duncan
  • Publication number: 20240073296
    Abstract: Sender Policy Framework (SPF) is one of the most widely used methods of distinguishing electronic mail that is authorized by the purported sending domain from unauthorized mail. SPF policies are published into a domain's DNS and then looked up and evaluated by mail receivers. Due to the complexity and limitations of the SPF specification, implementation mistakes are widespread. This problem is compounded by the common practice of nesting SPF policies which introduces hidden risks, particularly exceeding DNS lookup limits. To address these issues, inline service provider designation may be configured to capture the benefits of existing techniques without their associated costs. Additionally, the domain owner may enjoy simplified SPF service provider onboarding and policy failover redundancy to protect against SPF service provider disruptions, thus improving policy availability uptime.
    Type: Application
    Filed: July 31, 2023
    Publication date: February 29, 2024
    Inventors: Keith Wayne Coleman, Richard Duncan
  • Publication number: 20220373102
    Abstract: A sliding subsea foundation comprises a polymeric shoe layer on the underside of a mudmat or subsea structure. The shoe layer defines a soil-engaging face that comprises an array of parallel grooves. The grooves are shallower than the thickness of the shoe layer such that each groove has a closed top, defined by and integral with the shoe layer, that spans the groove. Where a subsea structure is supported on the foundation with a subsea pipeline attached to the structure, the grooves are substantially parallel to a longitudinal axis of the pipeline.
    Type: Application
    Filed: July 3, 2020
    Publication date: November 24, 2022
    Inventors: Stylianos Panayides, Toby Adam Powell, Keith Duncan Lauder
  • Patent number: 10563763
    Abstract: The present invention relates to a tank piston with an improved seal having a cap, a body attached to the periphery of the cap, a circumferential channel adjacent to the periphery of the cap and an annular seal held within the channel by an annular sheet. In one aspect of the invention the annular sheet secures the seal within the channel and is attached to the piston by a ring proximate to the periphery of the cap and a ring proximate to the back side of the circumferential channel. In another aspect of the invention the annular sheet is made from a friction reducing material and enables the piston to more easily move within the tank and subsequently extends the lifespan of the seal. Additionally, the annular sheet is fitted to the seal and attached above the front sidewall of the channel.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: February 18, 2020
    Assignee: Piston Tank Corporation
    Inventors: Anthony Frank DeJohn, Christopher Keith Duncan
  • Publication number: 20110217262
    Abstract: A method of treating an ocular surface disorder in a subject in need of such treatment is provided. The method includes exposing conjunctival tissue of the subject to an effective amount of a vasopermeability agent that increases conjunctival vascular permeability. In some embodiments, the agent is a nitric oxide donor, which may be in a sustained release form. A method of screening a substance for treating an ocular surface disorder is also provided.
    Type: Application
    Filed: March 7, 2011
    Publication date: September 8, 2011
    Inventors: Julia A. Kornfield, Robert H. Grubbs, Choon Woo Lee, Daniel Schwartz, Phoebe Lin, Keith Duncan
  • Publication number: 20050282750
    Abstract: The present invention addresses the treatment of age-related macular degeneration using regulation of pathogenic mechanisms similar to atherosclerosis. In further specific embodiments, compositions that increase reverse cholesterol transport are utilized as therapeutic targets for age-related macular degeneration. In a specific embodiment, the lipid content of the retinal pigment epithelium, and/or Bruch's membrane is reduced by delivering Apolipoprotein A1, particularly a mimetic peptide.
    Type: Application
    Filed: February 10, 2005
    Publication date: December 22, 2005
    Inventors: Daniel Schwartz, Keith Duncan, Kathy Bailey, John Kane, Brian Ishida
  • Publication number: 20030162758
    Abstract: The present invention addresses the treatment of age-related macular degeneration using regulation of pathogenic mechanisms similar to atherosclerosis. In further specific embodiments, reverse cholesterol transport components, such as transporters and HDL fractions, are utilized as diagnostic and therapeutic targets for age-related macular degeneration. In a specific embodiment, the lipid content of the retinal pigment epithelium, and/or Bruch's membrane is reduced.
    Type: Application
    Filed: December 6, 2002
    Publication date: August 28, 2003
    Inventors: Daniel M. Schwartz, Keith Duncan, Kathy Bailey, John Kane, Brian Ishida