Patent assignee · US · COMPANY

Passport Systems, Inc.

32Patents
27Active
32Granted
51Portfolio score

Filing activity: May 23, 1975 → Dec 20, 2017 · 16 expiring within 5 years

Most-cited patents

PatentTitleAreaCited byStatus
US7120226B2 Adaptive scanning of materials using nuclear resonance fluorescence imaging Physics 46 Expired
US4141458A Wafer transport system Emerging Cross-Sectional Technologies 33 Expired
US4030622A Wafer transport system Emerging Cross-Sectional Technologies 31 Expired
US7286638B2 Methods and systems for determining the average atomic number and mass of materials Physics 20 Expired
US7409042B2 Use of nearly monochromatic and tunable photon sources with nuclear resonance fluorescence in non-intrusive inspection of containers for material detection and imaging Physics 20 Active
US7372262B2 Methods and systems for active non-intrusive inspection and verification of cargo and goods Physics 16 Active
US7693262B2 Use of nearly monochromatic and tunable photon sources with nuclear resonance fluorescence in non-intrusive inspection of containers for material detection and imaging Physics 12 Active
US7634058B2 Methods and systems for determining the average atomic number and mass of materials Physics 4 Active
US8149988B2 Use of nearly monochromatic and tunable photon sources with nuclear resonance fluorescence in non-intrusive inspection of containers for material detection and imaging Physics 3 Active
US8836249B2 Methods and systems for confining charged particles to a compact orbit during acceleration using a non-scaling fixed field alternating gradient magnetic field Electricity 3 Active
US8340251B2 Thin walled tube radiator for bremsstrahlung at high electron beam intensities Electricity 3 Active
US10212231B2 Methods and systems for detecting a material source using a server and networked sensors Electricity 3 Active
US8169167B2 Methods for diagnosing and automatically controlling the operation of a particle accelerator Electricity 2 Active
US8041007B2 Methods and systems for determining the average atomic number and mass of materials Physics 2 Active
US7949097B2 Methods and apparatus for the identification of materials using photons scattered from the nuclear “PYGMY resonance” Physics 2 Active
US8280684B2 Diagnostic methods and apparatus for an accelerator using induction to generate an electric field with a localized curl Electricity 1 Active
US8264173B2 Methods and systems for accelerating particles using induction to generate an electric field with a localized curl Electricity 1 Active
US8259900B1 Adaptive scanning of materials using nuclear resonance fluorescence imaging Physics 1 Active
US8358730B2 Non-intrusive method to identify presence of nuclear materials using energetic prompt neutrons from neutron-induced fission Physics 1 Active
US8023618B2 Methods and apparatus for the identification of molecular and crystalline materials by the doppler broadening of nuclear states bound in molecules, crystals and mixtures using nuclear resonance fluorescence Physics 1 Active
US8180019B2 Methods and systems for computer tomography of nuclear isotopes using nuclear resonance fluorescence Physics 1 Active
US8867687B2 Non-intrusive method to identify presence of nuclear materials using energetic prompt neutrons from neutron-induced fission Physics 1 Active
US10942292B2 Non-intrusive method to identify presence of nuclear materials using energetic prompt neutrons from photon-induced fission Physics 0 Active
US8068582B2 Methods and systems for the directing and energy filtering of X-rays for non-intrusive inspection Physics 0 Active
US9678024B1 Methods and systems for non-intrusive chemical assaying of hydrogenous materials and mixtures using combined neutron activation and nuclear resonance fluorescence Physics 0 Active

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.