NEW
Recirculating chillers are designed for use with lasers; electron microscopes; and GC/MS, AA, and NMR instrumentation. The units provide 50015,000 Btu/h of cooling capacity over a temperature range of 0-40 °C. PolyScience 401
Instrumentation Cyclotron. Model AX-4500 electron cyclotron resonance source is designed for low-energy processing with high ion current density. The source can be used with reactive gases, including fluorine and chlorine. Specific applications include low-temperature dielectric deposition and etching of compound semiconductors. ASTeX 402 S o d i u m d e t e c t i o n . CFA-1011 sodium analyzer provides continuous measurement of low-level sodium in high-purity steam and water. Up to six different sample streams can be monitored with one instrument. Ionselective electrodes measure sodium in the low-pptr range. Solid-state s e n s i n g a n d reference electrodes eliminate the need for changing filling solutions. Scientific Instruments 403 LC. Model 340 LC solvent recycler decreases isocratic LC mobile-phase
PRODUCTS
consumption by up to 80%. An electrically actuated valve placed downstream from the system's detector diverts contaminated solvent to waste or recycles clean solvent for reuse. Alltech Associates 404
9 0 - 9 8 % of total solids and > 99% of all bacteria, viruses, pyrogens, and organic compounds with molecular weights > 150. The system delivers up to 1000 gallons of purified water per day. Vaponics 410
MS. HAL/3F PIC series quadrupole mass spectrometers are designed for fast-event UHV gas studies. Software capabilities include integration of desorption profiles, spectral subtraction, scaling, and superposition. Hiden Analytical 405
Particle size. Lab-Tec 1000 particle size analyzer measures up to 200,000 particles per second in 28 size increments. The system features a size range of 0.7-250 \xm, 20 different graphics displays, and a separate lap-top computer with a menudriven operating system. Lasentec 411
S p e c t r o m e t r y . SpectraPro i-series CCD imaging spectrographs feature triple indexable gratings, full wavelength scanning, and a wide selection of accessories. Applications include monitoring and testing of plasmas, lasers, LEDs, and other lightemitting processes. Acton Research Corp. 406 S e n s o r s . Model PFS-2 monitoring system, designed for whole-organ or tissue-slice perfusion studies, feat u r e s b i o c o m p a t i b l e micro flowt h r o u g h e l e c t r o d e s for pH, p 0 2 , p C 0 2 , and temperature. The system includes an output connector for direct hookup to a strip chart recorder. Lazar Research Laboratories 407 E n v i r o n m e n t a l analysis. SAM-I is an IR-based ambient air monitor that features autozero adjustments, three-level alarm circuits, and flow loss indicators. Applications include the measurement of ppm levels of the environmentally safe refrigerants HCFC-123 and HCFC-134a. General Analysis Corp. 408 NMR. PCT-2000 series NMR analyzers are designed for process control and quality assurance applications. Components include a specially configured industrial computer, a permanent magnet, rf electronics, and analysis-specific software. Process Control Technology Corp. 409 Water. Labpure reverse osmosis system uses cellulosic or polyamide spir a l - w o u n d m e m b r a n e s to remove
498 A · ANALYTICAL CHEMISTRY, VOL. 64, NO. 8, APRIL 15, 1992
Optical analyzer. Lamda LS-2000 multichannel optical analyzer features a 2048-element diode array, spectral response from 200 to 1100 nm, quantum efficiency of 65%, 5-ms read-out time, 12-bit analog-to-digital resolution, and multiple scanning modes. Alton Instruments 412
Software E l e c t r o n m i c r o s c o p y . NIST/NIH desktop spectrum analyzer and X-ray database features modes for both experiment simulation and data evaluation. The software is designed for Apple Macintosh II computers with a minimum of 4 MB memory. NIST 413 MS. BenchTop/PBM version 2.2 is a PC-based MS library search system that uses the Windows environment to combine PBM library search algorithms with the Wiley Registry of Mass Spectral Data (5th éd.). Features include user library capabilities and a new m a s s c h r o m a t o g r a m display. Palisade Corp. 414
Manufacturers' Literature C h r o m a t o g r a p h y . Brochure highlights the Chromosorb Century series of porous polymer supports. Performance c h a r a c t e r i s t i c s , general applications, and retention indices are discussed. 36 pp. Celite Corp. 415
K2 Fastscan multifrequency cross-correlation phase and modulation fluorometer is capable of performing both lifetime and steady-state measurements. Light modulation is achieved with a Pockels cell; frequency synthesizers provide modulation from 100 Hz to 1 GHz. ISS 422
Sulfur. Application note describes the determination of total sulfur in pulping liquor using the TitraLab titration system. Information on instrument settings, reagents, and procedures is provided. Radiometer 416 Filter paper. "How To Choose Papers for Test Kits and Devices" provides information on selecting the proper filter paper for diagnostic and analytical test devices. Schleicher & Schuell 417 Surface a n a l y s i s . Brochure highlights the PHI 7000 time-of-flight SIMS/SALI system for organic materials research. The surface analysis by laser ionization (SALI) technique is described. 6 pp. Perkin Elmer 418 Newsletter. Process Monitor provides i n f o r m a t i o n on a p p l i c a t i o n s a n d products for bioprocess development and scale-up. Vol. 1, No. 1 includes an article on rapid optimization of an ion-exchange purification. 6 pp. Sepracor 419 Lamps. Brochure describes single and m u l t i e l e m e n t hollow cathode lamps for atomic absorption analysis. Deuterium lamps and power supplies are also listed. 18 pp. Cathodeon 420
Catalogs Immunochemistry. Immunochemical catalog lists more than 1300 antibodies, growth factors, enzyme substrate and buffer tablets, and related products. A complete line of mouse isotype controls for use in flow cytometry is also offered. Sigma Immunochemicals 421
Chromatography. Catalog contains information on GC and LC columns and other supplies for GC, LC, GC/ MS, LC/MS, U V - v i s spectrophotometry, and FT-IR spectroscopy. 256 pp. Hewlett-Packard 423 Labware. Catalog includes beakers, bottles, burets, centrifuge tubes, containers, desiccators, dispensers, filt e r s , flasks, funnels, j a r s , pipets, racks, and safety products. 186 pp. Nalge 424 Life s c i e n c e s . Catalog describes products for chromatography, electrophoresis, immunochemistry, molecular biology, sample preparation, and liquid handling. 360 pp. Bio-Rad Laboratories 425 Laboratory products. Catalog includes furnaces, baths, hot plates, stirrers, incubators, mixers, shakers, heat tapes, mantles, and cryogenics equipment. 96 pp. Barnstead/Thermolyne 426 Safety. Catalog features products for personal protection, storage and handling, i n d u s t r i a l and environmental safety, and information and training. 754 pp. Lab Safety Supply 427
What Every Chemist Should Know about the U.S. Patent System!
Understanding Chemical Patents A Guide for the Inventor, Second Edition
L
earn how to read and understand patents, how to use patents as a source of information, how to recognize that an invention has been made, and how to work with attorneys or agents in seeking patent protection for inventions. Gain enough familiarity with the special terminology of patents to be able to deal comfortably with patent attorneys, agents, and technical liaison personnel. Understanding Chemical Patents answers the questions of not only practicing chemists and chemical engineers, but also people in other fields who need to understand the patent system. Contents • • • • • • • • • • • • • • • •
Introduction: The Purpose of Patents How to Read a Patent Patents as an Information Source Deciding Whether to File a Patent Application The Independent Inventor Preparation of the Patent Application Prosecuting the Patent Application Interferences and the Importance of Records Patent Infringement and Patent Claims Making Use of Patents The Employed Inventor Copyrights, Trademarks, and Trade Secrets Recent Biotechnology-Related Patent Law Changes in U.S. Patent Laws: 1980-1990 Trends in U.S. and World Patent Law Representative U.S. Patent Fees and Payment of Money
John T. Maynard and Howard M. Peters
Chromatography. Catalog includes GC and LC columns and packings, capillary electrophoresis columns, resin-containing cartridges, chemical standards, and products for air monitoring and sample preparation. 472 pp. Supelco 428
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