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Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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Class 250 | RADIANT ENERGY |
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250 | RADIO AND MICROWAVE ABSORPTION WAVEMETERS |
251 | ELECTRICALLY NEUTRAL MOLECULAR OR ATOMIC BEAM DEVICES AND METHODS |
252.1 | CALIBRATION OR STANDARDIZATION METHODS |
253 | GEOLOGICAL TESTING OR IRRADIATION |
254 | With drill or drilling |
255 | With sampling |
256 | Well testing apparatus and methods |
257 | With casing collar detection |
258 | By interface of fluids |
259 | With placement of tracer in or about well |
261 | With detector or detector circuit control |
262 | With particular detector signal circuit |
267 | With radiation control to detector |
268 | With well-engaging means |
269.1 | With source and detector |
269.2 | With plural types of detectors |
269.3 | Having gamma source and gamma detector |
269.4 | Having neutron source and neutron detector |
269.6 | Having neutron source and gamma detector |
265 | Plural detectors |
271 | CODED RECORD AND READERS; INVISIBLE RADIANT ENERGY TYPE |
281 | IONIC SEPARATION OR ANALYSIS |
282 | Methods |
285 | With plural, simultaneous ion generators |
286 | Ion beam pulsing means with detector synchronizing means |
288 | With sample supply means |
289 | With evacuation or sealing means |
290 | Cyclically varying ion selecting field means |
294 | Static field-type ion path-bending selecting means |
301 | METHODS OF DETERMINING OIL PRESENCE, CONTAMINATION OR CONCENTRATION |
302 | RADIATION TRACER METHODS |
304 | METHODS INCLUDING SEPARATION OR NONRADIANT TREATMENT OF TEST MATERIALS |
305 | ELECTRON ENERGY ANALYSIS |
306 | INSPECTION OF SOLIDS OR LIQUIDS BY CHARGED PARTICLES |
307 | Methods |
308 | Including a radioactive source |
309 | Positive ion probe or microscope type |
310 | Electron probe type |
311 | Electron microscope type |
440.11 | Analyte supports |
315.3 | SOURCE WITH CHARGED PLATE-TYPE DETECTOR |
316.1 | WITH INFRARED OR THERMAL PATTERN RECORDING |
324 | CORONA IRRADIATION |
580 | SOURCE WITH RECORDING DETECTOR |
581 | Using a stimulable phosphor |
591 | Including a light beam read-out |
328 | AUTOMATIC/SERIAL DETECTION OF SIMILAR SOURCES |
329 | RECORD PROJECTORS |
330 | INFRARED-TO-VISIBLE IMAGING |
331 | Including liquid crystal detector |
332 | Including detector array |
333 | Including image tube-type detector |
334 | Including means for scanning field of view |
335 | CLOUD OR BUBBLE CHAMBERS |
336.1 | INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING |
336.2 | Superconducting type |
337 | With heating of luminophors |
338.1 | Infrared responsive |
338.2 | Ferroelectric, ferromagnetic, photomagnetic types |
338.3 | Pyroelectric type |
338.4 | Semiconducting type |
338.5 | With means to analyze uncontained fluent material |
339.01 | With selection of plural discrete wavelengths or bands |
339.02 | Including detector array |
339.03 | Including temperature control means |
339.04 | Including temperature determining means |
339.05 | With additional noninfrared wavelengths |
339.06 | With radiation source |
339.07 | Including spectrometer or spectrophotometer |
339.09 | With calibration steps in measurement process |
339.1 | Determining moisture content |
339.11 | Measuring infrared radiation reflected from sample |
339.12 | Using sample absorption for chemical composition analysis |
339.14 | Detecting infrared emissive objects |
340 | Methods |
341.1 | With irradiation or heating of object or material |
341.2 | Including probe |
341.3 | Including polarizing means |
341.4 | With semiconductor sample |
341.5 | With calibration |
341.6 | Heating of object or material |
341.7 | With multiple sources |
341.8 | Measuring infrared radiation reflected from sample |
342 | Locating infrared emissive objects |
343 | With means to transmission-test contained fluent material |
347 | With movable beam deflector or focussing means |
349 | Plural signalling means |
351 | With periodic beam varying means |
352 | With temperature modifying means |
353 | With beam deflector or focussing means |
354.1 | Signalling means controls incident radiation |
356.1 | Flow metering |
357.1 | Fluent material level signalling |
358.1 | With means to inspect passive solid objects |
361R | With or including a luminophor |
362 | Methods |
363.01 | With radiant energy source |
363.02 | Body scanner or camera |
363.03 | With positron source |
363.04 | Emission tomography |
363.06 | Using coded aperture |
363.07 | With distortion correction |
363.08 | With detector support |
363.09 | With calibration |
363.1 | With a collimator |
364 | With fluent source handling or collecting means |
365 | Ultraviolet light source |
366 | Plural electric signalling means |
367 | Plural or composite luminophor |
368 | With optics |
369 | With output system |
361C | Chemiluminescent detection |
370.01 | Semiconductor system |
370.02 | Alpha particle detection system |
370.03 | Fission fragment/fissionable isotope detection system |
370.04 | Self-powered system |
370.05 | Neutron detection system |
370.06 | Discrimination-type system |
370.07 | Dose or dose rate measurement |
370.08 | Imaging system |
370.1 | Position sensitive detection system |
370.11 | Scintillation system |
370.12 | Of material other than germanium, diamond, or silicon |
370.14 | Particular detection structure (e.g., MOS, PIN) |
370.15 | Temperature control or compensation system |
371 | Methods |
372 | Ultraviolet light responsive means |
374 | Including a radiant energy responsive gas discharge device |
375 | Methods |
376 | With electroscopic indicators |
379 | With means to supply the gas |
382 | With means to ionize the gas |
385.1 | Plural chambers or three or more electrodes |
386 | With a periodic electrode bias varying means |
387 | With periodic electrode bias supply |
388 | With indicator |
389 | Including ionization means |
390.01 | Neutron responsive means |
390.02 | Radiographic analysis |
390.03 | With dose measurement |
390.04 | Composition analysis |
390.06 | Density/thickness/consistency analysis |
390.07 | Spectrum analysis |
390.1 | Including beam control |
390.11 | Including a scintillator |
390.12 | Position-sensitive |
391 | Methods |
392 | With indicating or recording means |
393 | With radiant energy source |
394 | Plural signalling means |
395 | Methods |
200 | PHOTOCELLS; CIRCUITS AND APPARATUS |
201.1 | Photocell controls its own optical systems |
201.2 | Automatic focus control |
201.3 | Of a microscope |
201.4 | Active autofocus |
201.6 | Based on triangulation |
201.7 | Based on contrast |
201.8 | Based on image shift |
201.9 | Light beam wavefront phase adaptation |
203.1 | Following a target (e.g., a star or instrument pointer or other object) other than a pattern |
202 | Following a pattern (e.g., line or edge) |
548 | Controlling web, strand, strip, or sheet |
549 | Cathode-ray tube |
204 | Adjusting optical system to balance brightness in plural paths |
205 | Controlling light source intensity |
550 | Interference pattern analysis (e.g., spatial filtering or holography) |
551 | Signal isolator |
552 | Solid state light source |
554 | Flame light source |
559.01 | With circuit for evaluating a web, strand, strip, or sheet |
559.02 | Evaluation of photographic film |
559.03 | Sequential detector arrangement |
559.04 | Evaluation by regions, zones, or pixels |
559.07 | With imaging |
559.09 | With polarization |
559.1 | With calibration |
559.11 | Detection of both reflected and transmitted light |
559.12 | Beam interruption or shadow |
559.16 | Detection of diffuse light |
559.19 | Measuring dimensions |
559.2 | With comparison to reference or standard |
559.21 | Volume |
559.22 | Profile |
559.24 | Transversal measurement (e.g., width, diameter, cross-sectional area) |
559.26 | Longitudinal measurement (e.g., length or spacing) |
559.27 | Thickness |
559.29 | Measuring position |
559.3 | With alignment detection |
559.31 | With triangulation |
559.32 | Measuring rate of motion or flow (change of position) |
559.33 | With robotics |
559.34 | Lead or wire bond inspection |
559.35 | Centroid |
559.36 | Edge |
559.37 | Angular orientation (e.g., skew) |
559.38 | Determining range from detector |
559.39 | With comparison to reference or standard |
559.4 | With indication of presence of material or feature |
206 | Photocell controlled circuit |
206.1 | Having means to generate positional information in at least one plane of a target moving relative to one or more photodetectors |
206.2 | Detection of positional information in two or more planes (e.g., azimuth and elevation; hour angle and declination) |
555 | Including coded record |
558 | Stereoplotters |
564 | With circuit for evaluating a fluent material |
207 | Electron multiplier |
208.1 | Plural photosensitive image detecting element arrays |
208.2 | Plural photosensitive nonimage detecting elements |
208.3 | With electronic scanning |
208.4 | Used to switch an electrical circuit or device on or off |
208.5 | With photodetector output ratioing other than by bridge or push-pull circuits |
208.6 | With specific relative positional geometry of photosensitive elements (e.g., an annular photosensitive element surrounding a coaxially mounted photosensitive element) |
210 | Bridge and push-pull circuits |
214R | Special photocell or electron tube circuits |
214P | Photographic control |
214D | Light dimmers |
214A | Amplifier type |
214PR | Photosensitive rheostat type |
214SG | Self-generating type |
214.1 | Special photocell |
214AG | Automatic gain control |
214AL | Ambient light responsive |
214B | Ambient light desensitizing means |
214C | Compensation |
214DC | Digital circuitry |
214L | Logarithmic/linear signal |
214RC | Rate of change |
214SF | Slave flash |
214SW | Electronic switch |
215 | Combined with diverse-type device |
216 | Optical or pre-photocell system |
227.11 | Light conductor |
227.12 | Optical delay line |
227.13 | Light pen |
227.14 | Condition responsive light guide (e.g., light guide is physically affected by parameter sensed which results in light conveyed to the photocell) |
227.15 | With detection of macroscopic break in fiber |
227.16 | With detection of fiber microbend caused by parameter affecting fiber |
227.17 | Causing polarization change in fiber |
227.18 | Causing light spectral frequency/wavelength change |
227.19 | With coherent interferrometric light |
227.2 | With imaging |
227.21 | With light chopping or modulation |
227.23 | With spectral frequency/wavelength discrimination |
227.24 | With coupling enhancement means |
227.26 | With scanning |
227.27 | With coherent interferrometric light |
227.28 | With specific configuration of light conductor components with respect to each other |
227.29 | With specific illumination or viewing orientation of light conductor relative to viewed object (e.g., light normal to, and detector at 45 degree angle to, viewed object) |
227.3 | With variable orientation of light conductor relative to viewed object (e.g., goniometer) |
227.31 | Side or edge illuminated light conductor or collector |
227.32 | End illuminated light conductor with noncircular geometric cross section |
566 | Including coded record |
573 | Fluent material in optical path |
221 | Controlled by article, person, or animal |
225 | Polarizing |
226 | Color (e.g., filter or spectroscope) |
228 | Integrating sphere |
229 | Light valve (e.g., iris diaphragm) |
231.1 | Actuated by dynamic external physical quantity |
231.11 | Actuated by gauge element deflection |
231.12 | Gyroscopes |
231.13 | Shaft angle transducers |
231.19 | Pressure-responsive light valves |
230 | Reflection type(e.g., mirror galvanometer) |
232 | Light chopper type |
578.1 | Plural light sources or optical paths |
234 | Means for moving optical system |
237R | Hoods, grating, baffles, diaphragms, masks |
238 | Temperature control of photocell |
239 | Housings (in addition to cell casing) |
396R | WITH CHARGED PARTICLE BEAM DEFLECTION OR FOCUSSING |
423R | ION GENERATION |
424 | Methods |
425 | With sample vaporizing means |
426 | Arc type |
427 | Electron bombardment type |
423P | Photoionization type |
423F | Field ionization type |
428 | FLUENT MATERIAL CONTAINMENT, SUPPORT OR TRANSFER MEANS |
429 | With temperature control |
430 | With valve or pump actuator |
431 | With cleaning means |
432R | With irradiating source or radiating fluent material |
453.11 | SUPPORTED FOR NONSIGNALLING OBJECTS OF IRRADIATION (E.G., WITH CONVEYOR MEANS) |
458.1 | LUMINOPHOR IRRADIATION |
472.1 | INVISIBLE RADIATION RESPONSIVE NONELECTRIC SIGNALLING |
473.1 | Methods |
474.1 | Optical change type |
475.2 | Photographic type |
483.1 | Luminescent device |
489 | ION COLLECTORS |
491.1 | MEANS TO ALIGN OR POSITION AN OBJECT RELATIVE TO A SOURCE OR DETECTOR |
492.1 | IRRADIATION OF OBJECTS OR MATERIAL |
493.1 | RADIANT ENERGY GENERATION AND SOURCES |
494.1 | Plural radiation sources |
496.1 | With container for radioactive source and radiation directing or selectable shielding |
497.1 | With means to move source between shielded and unshielded position |
498.1 | With pivoted or rotatable radiation shield |
503.1 | With radiation modifying member |
505.1 | RADIATION CONTROLLING MEANS |
522.1 | SOURCE SUPPORTS |
526 | MISCELLANEOUS |
CROSS-REFERENCE ART COLLECTIONS | ||
900 | OPTICAL LIQUID LEVEL SENSORS |
901 | With gap between light guide elements (includes open light path preset) |
904 | With single light guide element to guide light in a continuous path |
909 | METHODS AND APPARATUS ANCILLARY TO STIMULABLE PHOSPHOR SYSTEMS |
910 | FOOD SAMPLE ANALYSIS USING INVISIBLE RADIANT ENERGY SOURCE |
FOREIGN ART COLLECTIONS | ||
FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
DIGESTS | ||
DIG1 | PASSIVE INTRUSION DETECTORS |
DIG2 | RADON DETECTION |
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