Phillips Petroleum Co
Phillips PActive Patents
0
Total Holdings
192
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US5585318A | Alkyne hydrogenation process | Expired / Lapsed | 1995-11-20 | 1996-12-17 | 21 | Details |
| US5583274A | Alkyne hydrogenation process | Expired / Lapsed | 1995-01-20 | 1996-12-10 | 20 | Details |
| US4668461A | Polymers and rotationally molding same | Expired / Lapsed | 1984-05-08 | 1987-05-26 | 11 | Details |
| US4109941A | Coupling for plastic pipe | Expired / Lapsed | 1976-06-08 | 1978-08-29 | 7 | Details |
| US4070044A | Polymer pipe connection and method to make it | Expired / Lapsed | 1976-01-22 | 1978-01-24 | 7 | Details |
| US3989787A | Method of rotational molding a thermosetting article with a… | Expired / Lapsed | 1975-07-28 | 1976-11-02 | 10 | Details |
| US3857852A | Crackle finish coating of arylene sulfide polymer containin… | Expired / Lapsed | 1972-10-19 | 1974-12-31 | 10 | Details |
| US3821349A | Internal cooling of polyethylene terephthalate tubing | Expired / Lapsed | 1972-06-15 | 1974-06-28 | 8 | Details |
| US3801690A | Closing mold halves on stretched portion of individual pari… | Expired / Lapsed | 1972-02-16 | 1974-04-02 | 0 | Details |
| US3786982A | Thermoformed snap closures | Expired / Lapsed | 1971-11-17 | 1974-01-22 | 9 | Details |
| US3721253A | Controlling apparatus and method | Expired / Lapsed | 1971-09-24 | 1973-03-20 | 12 | Details |
| US3638916A | Method and apparatus for blending materials | Expired / Lapsed | 1970-09-01 | 1972-02-01 | 4 | Details |
| US3622376A | TiO{11 {0 IN POLY(ARYLENE SULFIDE) FOR COATING COMPOSITION | Expired / Lapsed | 1968-08-15 | 1971-11-23 | 11 | Details |
| US3618447A | Deterioration fasteners | Expired / Lapsed | 1969-09-15 | 1971-11-09 | 0 | Details |
| US3555135A | Stress relieving of molded plastic structures | Expired / Lapsed | 1968-02-29 | 1971-01-12 | 0 | Details |
| US3497572A | High impact resin compositions | Expired / Lapsed | 1967-08-24 | 1970-02-24 | 0 | Details |
| US3491935A | Method of forming a peelable seal | Expired / Lapsed | 1966-08-08 | 1970-01-27 | 0 | Details |
| US3457781A | Modified dynamometer | Expired / Lapsed | 1966-08-29 | 1969-07-29 | 0 | Details |
| US3439622A | Motor control circuit utilizing a voltage controlled rectif… | Expired / Lapsed | 1966-09-02 | 1969-04-22 | 0 | Details |
| US3419369A | Manufacturing town gas from liquefied natural gas | Expired / Lapsed | 1965-03-19 | 1968-12-31 | 0 | Details |
| US3401400A | Apparatus for color display of seismic data | Expired / Lapsed | 1966-10-20 | 1968-09-10 | 0 | Details |
| US3399542A | Method and apparatus for cooling compressor recycle gas | Expired / Lapsed | 1967-05-25 | 1968-09-03 | 0 | Details |
| US3338810A | Ultraviolet light reaction between an alkyl polythiol and a… | Expired / Lapsed | 1964-10-05 | 1967-08-29 | 3 | Details |
| US3334691A | Apparatus for shutting off water during air drilling | Expired / Lapsed | 1964-11-06 | 1967-08-08 | 2 | Details |
| US3333760A | Carrier | Expired / Lapsed | 1966-07-11 | 1967-08-01 | 2 | Details |
| US3322613A | Laminated sheet material | Expired / Lapsed | 1963-02-11 | 1967-05-30 | 3 | Details |
| US3310505A | Production of thermoplastic materials | Expired / Lapsed | 1963-03-11 | 1967-03-21 | 2 | Details |
| US3303402A | Single phase induction motor | Expired / Lapsed | 1964-01-09 | 1967-02-07 | 2 | Details |
| US3293542A | Electrical well logging apparatus including a drill collar … | Expired / Lapsed | 1963-03-18 | 1966-12-20 | 2 | Details |
| US3286510A | Drilling mud test apparatus and process | Expired / Lapsed | 1964-05-18 | 1966-11-22 | 2 | Details |
| US3245466A | Breaking oil-in-water emulsions and removal of solid matter… | Expired / Lapsed | 1962-08-03 | 1966-04-12 | 2 | Details |
| US3242720A | Apparatus for determining rheological properties | Expired / Lapsed | 1963-09-30 | 1966-03-29 | 2 | Details |
| US3219803A | Electrical measuring apparatus | Expired / Lapsed | 1962-01-08 | 1965-11-23 | 2 | Details |
| US3217828A | Seismic prospecting | Expired / Lapsed | 1962-01-12 | 1965-11-16 | 2 | Details |
| US3214074A | Container provided with cover seal and removable inner lid | Expired / Lapsed | 1963-09-03 | 1965-10-26 | 2 | Details |
| US3211223A | Underwater well completion | Expired / Lapsed | 1961-12-26 | 1965-10-12 | 2 | Details |
| US3196123A | Polymer surfaces enhanced for printing by addition of epoxi… | Expired / Lapsed | 1962-01-05 | 1965-07-20 | 2 | Details |
| US3193978A | Heat sealing thermoplastic packages | Expired / Lapsed | 1962-01-22 | 1965-07-13 | 1 | Details |
| US3188258A | Bonding of olefin polymers | Expired / Lapsed | 1957-12-30 | 1965-06-08 | 1 | Details |
| US3174298A | Process controller | Expired / Lapsed | 1962-01-02 | 1965-03-23 | 1 | Details |
| US3165563A | Method for the production of a fibrous material | Expired / Lapsed | 1960-06-22 | 1965-01-12 | 2 | Details |
| US3139468A | Altering dimension of vulcanized transpolybutadiene and hea… | Expired / Lapsed | 1960-06-20 | 1964-06-30 | 2 | Details |
| US3132194A | Preparation of microporous filamentous articles | Expired / Lapsed | 1962-04-09 | 1964-05-05 | 2 | Details |
| US3131521A | Heat sealing thermoplastic packages | Expired / Lapsed | 1961-03-23 | 1964-05-05 | 0 | Details |
| US3119995A | Timing apparatus | Expired / Lapsed | 1962-02-20 | 1964-01-28 | 2 | Details |
| US3119992A | Dead time system for analog computer | Expired / Lapsed | 1958-10-30 | 1964-01-28 | 1 | Details |
| US3112880A | Furnace control | Expired / Lapsed | 1962-11-21 | 1963-12-03 | 1 | Details |
| US3108929A | Fluid analyzer for control system | Expired / Lapsed | 1960-01-15 | 1963-10-29 | 2 | Details |
| US3105493A | Suture | Expired / Lapsed | 1960-04-21 | 1963-10-01 | 2 | Details |
| US3105896A | Measurement and control of polymerization reactions | Expired / Lapsed | 1957-12-04 | 1963-10-01 | 2 | Details |
| US3103036A | Method and apparatus for producing double-walled containers | Expired / Lapsed | 1961-05-29 | 1963-09-10 | 4 | Details |
| US3094875A | Low level voltage to frequency converter | Expired / Lapsed | 1961-09-29 | 1963-06-25 | 2 | Details |
| US3084489A | Method of sealing thermoplastic film overwrap | Expired / Lapsed | 1959-12-28 | 1963-04-09 | 2 | Details |
| US3070777A | Ghost elimination | Expired / Lapsed | 1959-01-02 | 1962-12-25 | 0 | Details |
| US3060989A | Blends of cis-polybutadiene with either natural rubber or c… | Expired / Lapsed | 1959-08-17 | 1962-10-30 | 3 | Details |
| US3054406A | Surgical mesh | Expired / Lapsed | 1958-10-17 | 1962-09-18 | 0 | Details |
| US3049908A | Programmer-integrator for chromatographic analyzer | Expired / Lapsed | 1958-08-15 | 1962-08-21 | 0 | Details |
| US3050513A | Process and catalyst for production of rubbery polymers | Expired / Lapsed | 1956-04-20 | 1962-08-21 | 2 | Details |
| US3044236A | System for removal of gases from liquids | Expired / Lapsed | 1960-07-21 | 1962-07-17 | 0 | Details |
| US3040833A | Seismic exploration | Expired / Lapsed | 1957-01-14 | 1962-06-26 | 0 | Details |
| US3039309A | Pneumatically actuated pump and sampling system | Expired / Lapsed | 1957-09-13 | 1962-06-19 | 0 | Details |
| US3022541A | Producing indicia in film by modification of film opacity | Expired / Lapsed | 1960-02-05 | 1962-02-27 | 2 | Details |
| US3021568A | Injection molding of plastic materials | Expired / Lapsed | 1958-10-15 | 1962-02-20 | 0 | Details |
| US3022209A | Method of welding butted pipe sections of polyethylene to f… | Expired / Lapsed | 1956-11-23 | 1962-02-20 | 2 | Details |
| US3019486A | Method of making plastic hinge | Expired / Lapsed | 1957-12-20 | 1962-02-06 | 2 | Details |
| US3016970A | Interpretation of seismic records | Expired / Lapsed | 1958-11-17 | 1962-01-16 | 0 | Details |
| US3013926A | Process of preparing coated, laminated, and sized articles … | Expired / Lapsed | 1958-01-30 | 1961-12-19 | 2 | Details |
| US3011931A | Composite rubber article | Expired / Lapsed | 1957-03-27 | 1961-12-05 | 2 | Details |
| US3002818A | Process control system | Expired / Lapsed | 1956-11-28 | 1961-10-03 | 2 | Details |
| US2997432A | Dyeing of 1-olefin polymers | Expired / Lapsed | 1958-08-14 | 1961-08-22 | 2 | Details |
| US2985469A | Snap-fit plastic pipe joint | Expired / Lapsed | 1957-09-09 | 1961-05-23 | 0 | Details |
| US2985596A | Finely powdered chromia-alumina dehydrogenation catalyst an… | Expired / Lapsed | 1953-06-22 | 1961-05-23 | 0 | Details |
| US2983771A | Conversion of hydrocarbons | Expired / Lapsed | 1957-12-02 | 1961-05-09 | 4 | Details |
| US2974227A | Analyzer | Expired / Lapsed | 1958-05-07 | 1961-03-07 | 0 | Details |
| US2974017A | Measurement of polymerization reractions | Expired / Lapsed | 1957-11-21 | 1961-03-07 | 2 | Details |
| US2973241A | Method for producing high crystalline 1-olefin polymers of … | Expired / Lapsed | 1956-10-26 | 1961-02-28 | 1 | Details |
| US2972716A | Analytical instrument utilizing ionization and selective ev… | Expired / Lapsed | 1955-07-07 | 1961-02-21 | 0 | Details |
| US2966232A | Process and apparatus for separating finely divided solids … | Expired / Lapsed | 1958-05-02 | 1960-12-27 | 0 | Details |
| US2965562A | Hydrocracking hydrocarbon oils with a catalyst composite, c… | Expired / Lapsed | 1957-12-09 | 1960-12-20 | 1 | Details |
| US2954470A | Mass spectrometer and method | Expired / Lapsed | 1957-04-12 | 1960-09-27 | 0 | Details |
| US2953659A | Shut-down device | Expired / Lapsed | 1955-05-16 | 1960-09-20 | 0 | Details |
| US2951816A | Polymerization catalyst and production thereof | Expired / Lapsed | 1958-01-06 | 1960-09-06 | 2 | Details |
| US2940071A | Analog to digital converter | Expired / Lapsed | 1956-01-16 | 1960-06-07 | 0 | Details |
| US2940061A | Signal recording system | Expired / Lapsed | 1955-10-24 | 1960-06-07 | 0 | Details |
| US2928697A | Pivoted valve structure | Expired / Lapsed | 1957-01-14 | 1960-03-15 | 0 | Details |
| US2927904A | Method of foaming blend of crystalline 1-olefin polymer and… | Expired / Lapsed | 1956-11-19 | 1960-03-08 | 2 | Details |
| US2926409A | Snap friction locking device | Expired / Lapsed | 1957-09-23 | 1960-03-01 | 0 | Details |
| US2926331A | Seismic exploration | Expired / Lapsed | 1957-02-04 | 1960-02-23 | 0 | Details |
| US2920266A | Electrical well logging | Expired / Lapsed | 1956-08-08 | 1960-01-05 | 0 | Details |
| US2917077A | Excess flow check valve | Expired / Lapsed | 1953-11-09 | 1959-12-15 | 0 | Details |
| US2913448A | Treatment of polymers | Expired / Lapsed | 1956-05-25 | 1959-11-17 | 2 | Details |
| US2910139A | Drying of gases | Expired / Lapsed | 1957-04-03 | 1959-10-27 | 1 | Details |
| US2910461A | Continuous process for the production of high molecular wei… | Expired / Lapsed | 1956-05-14 | 1959-10-27 | 2 | Details |
| US2904846A | Method for coating filamentous articles | Expired / Lapsed | 1956-12-31 | 1959-09-22 | 2 | Details |
| US2900998A | Check valve | Expired / Lapsed | 1955-12-01 | 1959-08-25 | 0 | Details |
| US2893692A | Vibratory impact tool | Expired / Lapsed | 1955-01-03 | 1959-07-07 | 0 | Details |
| US2891239A | Angular position telemetering system | Expired / Lapsed | 1954-04-09 | 1959-06-16 | 0 | Details |
| US2888089A | Seismic exploration | Expired / Lapsed | 1956-09-27 | 1959-05-26 | 0 | Details |
| US2888436A | Polyfunctional polymeric products | Expired / Lapsed | 1955-02-18 | 1959-05-26 | 1 | Details |
| US2881235A | Process control method and apparatus | Expired / Lapsed | 1957-03-20 | 1959-04-07 | 4 | Details |
| US2874356A | Method of and apparatus for seismic prospecting | Expired / Lapsed | 1952-04-02 | 1959-02-17 | 0 | Details |
| US2867848A | Heat-stress cracking resistance of thermoplastic filamentou… | Expired / Lapsed | 1956-11-23 | 1959-01-13 | 2 | Details |
| US2857803A | Differential refractometer cell | Expired / Lapsed | 1956-03-12 | 1958-10-28 | 0 | Details |
| US2855449A | Method of and apparatus for the acid-catalyzed alkylation o… | Expired / Lapsed | 1954-03-12 | 1958-10-07 | 4 | Details |
| US2853575A | Flow-responsive device | Expired / Lapsed | 1955-05-09 | 1958-09-23 | 0 | Details |
| US2853209A | Container | Expired / Lapsed | 1955-01-13 | 1958-09-23 | 0 | Details |
| US2844568A | Indicating and/or control system and method | Expired / Lapsed | 1955-10-10 | 1958-07-22 | 2 | Details |
| US2839149A | Method of and apparatus for multiplying and integrating var… | Expired / Lapsed | 1950-05-19 | 1958-06-17 | 0 | Details |
| US2837960A | Differential refractometer | Expired / Lapsed | 1955-05-09 | 1958-06-10 | 0 | Details |
| US2825721A | Polymers and production thereof | Expired / Lapsed | 1956-03-26 | 1958-03-04 | 2 | Details |
| US2817691A | Catalyst regeneration analysis and control | Expired / Lapsed | 1953-09-24 | 1957-12-24 | 2 | Details |
| US2805311A | Temperature measurement and control | Expired / Lapsed | 1953-05-04 | 1957-09-03 | 0 | Details |
| US2799758A | Electrical temperature indicating device | Expired / Lapsed | 1951-09-24 | 1957-07-16 | 2 | Details |
| US2785212A | Regenerative furnace and production of unsaturated hydrocar… | Expired / Lapsed | 1954-11-29 | 1957-03-12 | 4 | Details |
| US2773795A | Rubber-fabric laminates and method of making same | Expired / Lapsed | 1953-01-05 | 1956-12-11 | 4 | Details |
| US2769341A | Pressure balance indicator | Expired / Lapsed | 1952-06-02 | 1956-11-06 | 0 | Details |
| US2764536A | Differential analyzer and control system | Expired / Lapsed | 1951-09-17 | 1956-09-25 | 2 | Details |
| US2747840A | Apparatus for developing underwater reservoirs | Expired / Lapsed | 1953-06-12 | 1956-05-29 | 2 | Details |
| US2742756A | Temperature measurement and override control for turbojet e… | Expired / Lapsed | 1951-06-04 | 1956-04-24 | 4 | Details |
| US2741917A | Flowmeter | Expired / Lapsed | 1952-10-13 | 1956-04-17 | 2 | Details |
| US2720594A | Multi-component infrared analyzer | Expired / Lapsed | 1951-01-02 | 1955-10-11 | 2 | Details |
| US2718449A | Pulse measuring apparatus | Expired / Lapsed | 1949-09-23 | 1955-09-20 | 0 | Details |
| US2718145A | Surface indicating bottom-hole pressure measuring device | Expired / Lapsed | 1949-09-16 | 1955-09-20 | 2 | Details |
| US2712415A | Optical computer | Expired / Lapsed | 1954-04-28 | 1955-07-05 | 0 | Details |
| US2703491A | Strain measuring instrument | Expired / Lapsed | 1949-10-21 | 1955-03-08 | 0 | Details |
| US2701832A | Moisture-sensitive element | Expired / Lapsed | 1951-11-09 | 1955-02-08 | 2 | Details |
| US2699836A | Separation of gases by diffusion | Expired / Lapsed | 1951-10-15 | 1955-01-18 | 0 | Details |
| US2691573A | Desulfurization in the gasification of coal | Expired / Lapsed | 1950-12-15 | 1954-10-12 | 2 | Details |
| US2691303A | Magnetic type flowmeter | Expired / Lapsed | 1950-06-19 | 1954-10-12 | 0 | Details |
| US2674321A | Low water-loss cement slurry | Expired / Lapsed | 1949-12-19 | 1954-04-06 | 2 | Details |
| US2663765A | Noise suppression device | Expired / Lapsed | 1949-03-07 | 1953-12-22 | 0 | Details |
| US2663379A | Apparatus for hydrocarbon determination | Expired / Lapsed | 1948-05-10 | 1953-12-22 | 0 | Details |
| US2658180A | Vacuum tube voltmeter | Expired / Lapsed | 1950-04-10 | 1953-11-03 | 0 | Details |
| US2653294A | Apparatus for electrical well logging | Expired / Lapsed | 1949-04-21 | 1953-09-22 | 0 | Details |
| US2651995A | Switch for automatic pumping units | Expired / Lapsed | 1951-10-23 | 1953-09-15 | 0 | Details |
| US2650496A | Fluid flowmeter with heated resistance bridge circuit | Expired / Lapsed | 1948-05-17 | 1953-09-01 | 0 | Details |
| US2645949A | Pressure balance indicator | Expired / Lapsed | 1949-05-09 | 1953-07-21 | 0 | Details |
| US2641535A | Treatment of furnace blacks | Expired / Lapsed | 1949-04-14 | 1953-06-09 | 2 | Details |
| US2640269A | Liquid level indicator | Expired / Lapsed | 1949-12-30 | 1953-06-02 | 0 | Details |
| US2636383A | Well bore measuring and fluid metering device | Expired / Lapsed | 1948-01-23 | 1953-04-28 | 0 | Details |
| US2614166A | Method for determining the direction of arrival of waves | Expired / Lapsed | 1950-04-24 | 1952-10-14 | 0 | Details |
| US2601632A | Producing an improved synthetic rubber from a multicomponen… | Expired / Lapsed | 1949-11-25 | 1952-06-24 | 2 | Details |
| US2599775A | Electrostatic seismometer | Expired / Lapsed | 1948-07-01 | 1952-06-10 | 0 | Details |
| US2584809A | Computer for solving simultaneous equations | Expired / Lapsed | 1949-08-01 | 1952-02-05 | 0 | Details |
| US2574006A | Method of recovering hydrogen fluoride in an alkylation pro… | Expired / Lapsed | 1947-10-17 | 1951-11-06 | 2 | Details |
| US2570951A | Pipe-line scraper signaling system | Expired / Lapsed | 1948-12-31 | 1951-10-09 | 0 | Details |
| US2564700A | Production of carbon black | Expired / Lapsed | 1947-04-25 | 1951-08-21 | 2 | Details |
| US2556799A | Heteropolymerization of sulfur dioxide and an unsaturated o… | Expired / Lapsed | 1949-04-28 | 1951-06-12 | 2 | Details |
| US2547970A | Controlling heating valve of natural gas | Expired / Lapsed | 1948-02-28 | 1951-04-10 | 2 | Details |
| US2544734A | Automatic filler | Expired / Lapsed | 1947-07-14 | 1951-03-13 | 0 | Details |
| US2534489A | Automatic sampler of liquid and gas phase streams | Expired / Lapsed | 1945-07-02 | 1950-12-19 | 0 | Details |
| US2531403A | Process for coagulating a latex of a sulfur dioxide resin | Expired / Lapsed | 1949-07-08 | 1950-11-28 | 2 | Details |
| US2525818A | Production of nitriles | Expired / Lapsed | 1946-06-24 | 1950-10-17 | 2 | Details |
| US2518307A | Automatic control of catalyst promoter in a hydrocarbon con… | Expired / Lapsed | 1946-11-04 | 1950-08-08 | 2 | Details |
| US2502525A | Controlled cycle relief valve | Expired / Lapsed | 1944-07-05 | 1950-04-04 | 0 | Details |
| US2496338A | Detonation indicator circuit and method | Expired / Lapsed | 1945-01-18 | 1950-02-07 | 0 | Details |
| US2489394A | Variable flow gas sampling method and apparatus | Expired / Lapsed | 1945-12-18 | 1949-11-29 | 0 | Details |
| US2487863A | Tank car unloading system | Expired / Lapsed | 1946-07-01 | 1949-11-15 | 0 | Details |
| US2479772A | Method of and apparatus for geophysical exploration | Expired / Lapsed | 1948-07-29 | 1949-08-23 | 0 | Details |
| US2472070A | Pressure controlled liquid outlet valve | Expired / Lapsed | 1946-04-15 | 1949-06-07 | 0 | Details |
| US2453456A | Instrument for measuring water flow in wells | Expired / Lapsed | 1945-03-07 | 1948-11-09 | 0 | Details |
| US2450352A | Seismic wave correction means and method | Expired / Lapsed | 1944-07-25 | 1948-09-28 | 0 | Details |
| US2448322A | Detonation meter | Expired / Lapsed | 1943-09-20 | 1948-08-31 | 0 | Details |
| US2435545A | Process for the production of mercaptans | Expired / Lapsed | 1944-09-28 | 1948-02-03 | 0 | Details |
| US2430246A | Automatic volume control for seismograph amplifiers | Expired / Lapsed | 1944-07-25 | 1947-11-04 | 0 | Details |
| US2408842A | Automatic cylinder filling device | Expired / Lapsed | 1942-06-22 | 1946-10-08 | 0 | Details |
| US2404622A | Well logging apparatus | Expired / Lapsed | 1942-03-10 | 1946-07-23 | 0 | Details |
| US2390270A | Method of surface prospecting | Expired / Lapsed | 1942-01-05 | 1945-12-04 | 0 | Details |
| US2385378A | Well surveying | Expired / Lapsed | 1942-06-11 | 1945-09-25 | 0 | Details |
| US2373358A | Catalytic process and apparatus | Expired / Lapsed | 1943-12-31 | 1945-04-10 | 0 | Details |
| US2370817A | Method and apparatus for treating drilling fluid | Expired / Lapsed | 1941-02-13 | 1945-03-06 | 0 | Details |
| US2369238A | Electrical circuit | Expired / Lapsed | 1944-02-16 | 1945-02-13 | 0 | Details |
| US2356095A | Process for the purification of hydrocarbon liquids | Expired / Lapsed | 1942-01-27 | 1944-08-15 | 0 | Details |
| US2355366A | Process for catalytically desulphurizing hydrocarbon oil | Expired / Lapsed | 1942-01-12 | 1944-08-08 | 0 | Details |
| US2350584A | Furfural purification method | Expired / Lapsed | 1942-09-28 | 1944-06-06 | 0 | Details |
| US2347778A | Method of recovering hydrocarbons | Expired / Lapsed | 1941-11-10 | 1944-05-02 | 0 | Details |
| US2347794A | Well surveying device | Expired / Lapsed | 1941-03-15 | 1944-05-02 | 0 | Details |
| US2347317A | Treatment of mixtures of hydrocarbons and hydrofluoric acid | Expired / Lapsed | 1942-04-06 | 1944-04-25 | 0 | Details |
| US2340008A | Flowmeter for hydrofluoric acid | Expired / Lapsed | 1942-01-29 | 1944-01-25 | 0 | Details |
| US2317901A | Conversion of hydrocarbons | Expired / Lapsed | 1940-03-11 | 1943-04-27 | 0 | Details |
| US2316361A | Method and apparatus for surveying wells | Expired / Lapsed | 1941-03-17 | 1943-04-13 | 0 | Details |
| US2314540A | Apparatus for measuring volume of bottom hole portion of we… | Expired / Lapsed | 1941-12-30 | 1943-03-23 | 0 | Details |
| US2297098A | Rectifying column control | Expired / Lapsed | 1940-03-23 | 1942-09-29 | 0 | Details |
| US2290408A | Exploration of boreholes | Expired / Lapsed | 1941-02-21 | 1942-07-21 | 0 | Details |
| US2250912A | Well drilling system | Expired / Lapsed | 1939-10-09 | 1941-07-29 | 0 | Details |
| US2250703A | Apparatus for locating casing seats | Expired / Lapsed | 1938-11-18 | 1941-07-29 | 0 | Details |
| US2245485A | Pressure regulating device | Expired / Lapsed | 1938-04-12 | 1941-06-10 | 0 | Details |
| US2242627A | Hydrogenation catalyst and process | Expired / Lapsed | 1938-11-12 | 1941-05-20 | 0 | Details |
| US2176406A | Heat exchanger tube support | Expired / Lapsed | 1937-07-01 | 1939-10-17 | 0 | Details |
| US2159434A | Process for concentrating hydrocarbons | Expired / Lapsed | 1936-06-27 | 1939-05-23 | 0 | Details |
| US2139595A | Method for dissolving paraffing and wax | Expired / Lapsed | 1935-11-11 | 1938-12-06 | 0 | Details |
| US2110144A | Mechanical oscillator | Expired / Lapsed | 1935-07-24 | 1938-03-08 | 0 | Details |