Series, patenting

SCHEME 3.57 Chemical structures of DSA series patented by Idemitsu Kosan Co. Ltd. 

In the 1950s pressure was extended by the tire companies on Parrel-Birmingham to develop a continuous mixing machine to replace the Banbury Mixer. This resulted in the invention of the Parrel Continuous Mixer, which was designed in a series patents filed from the early 1960s [199 to 202], shown in Fig. 9.32. 

The mechanism of the Fischer-Tropsch reactions has been the object of much study (note Eqs. XVI11-55-XV111-57) and the subject of much controversy. Fischer and Tropsch proposed one whose essential feature was that of a metal carbide—patents have been issued on this basis. It is currently believed that a particular form of active adsorbed carbon atoms is involved, which is then methanated through a series of steps such as... 

Even ia 1960 a catalytic route was considered the answer to the pollution problem and the by-product sulfate, but nearly ten years elapsed before a process was developed that could be used commercially. Some of the eadier attempts iacluded hydrolysis of acrylonitrile on a sulfonic acid ion-exchange resia (69). Manganese dioxide showed some catalytic activity (70), and copper ions present ia two different valence states were described as catalyticaHy active (71), but copper metal by itself was not active. A variety of catalysts, such as Umshibara or I Jllmann copper and nickel, were used for the hydrolysis of aromatic nitriles, but aUphatic nitriles did not react usiag these catalysts (72). Beginning ia 1971 a series of patents were issued to The Dow Chemical Company (73) describiag the use of copper metal catalysis. Full-scale production was achieved the same year. A solution of acrylonitrile ia water was passed over a fixed bed of copper catalyst at 85°C, which produced a solution of acrylamide ia water with very high conversions and selectivities to acrylamide. 

The earliest large-scale continuous industrial extraction equipment consisted of mixer—settlers and open-spray columns. The vertical stacking of a series of mixer—settlers was a feature of a patented column in 1935 (96) in which countercurrent flow occurred because of density difference between the phases, avoiding the necessity for interstage pumping. This was a precursor of the agitated column contactors which have been developed and commercialized since the late 1940s. There are several texts (1,2,6,97—98) and reviews (99—100) available that describe the various types of extractors. 

There is a wide variety of dyes unique to the field of hair coloring. Successive N-alkylation of the nitrophenylenediamines has an additive bathochromic effect on the visible absorption to the extent that violet-blue dyes can be formed. Since the simple A/-alkyl derivatives do not have good dyeing properties, patent activity has concentrated on the superior A/-hydroxyalkyl derivatives of nitrophenylenediamines (29,30), some of which have commercial use (31). Other substituents have been used (32). A series of patents also have been issued on substituted water-soluble azo and anthraquinone dyes bearing quaternary ammonium groups (33). 

A series of patents from Sobering AG has described the synthesis of various 14—17 a- and P-ethano-bridged estratriene compounds represented by... 

The European Patent office ESPACE series of CD-ROM products Table 11. ESPACE Series of CD-ROM Databases are summarized ia Table 11. 

Commercial metal anodes for the chlorine industry came about after the late 1960s when a series of worldwide patents were awarded (6—8). These were based not on the use of the platinum-group metals (qv) themselves, but on coatings comprised of platinum-group metal oxides or a mixture of these oxides with valve metal oxides, such as titanium oxide (see Platinum-GROUP metals, compounds Titanium compounds). In the case of chlor-alkaH production, the platinum-group metal oxides that proved most appropriate for use as coatings on anodes were those of mthenium and iridium. 

Plants. AsexuaHy reproducing plants, ie, those not propagated by means of seed, also represent a legally recognized class of patentable subject matter under U.S. patent laws. Additionally, the inventor must have discovered and asexuaHy reproduced the plant that is to be the subject of the patent apphcation. Plant patents are assigned a different series of numbers than the majority of patents discussed in the foregoing, such as U.S. Plant Patent No. 3,360 titled "Peach Tree" (7). 

In response to the first office action, the appHcant may file a series of amendments (step 6) and should provide substantial reasoning and analysis to explain the reasons that the pubHcation(s) cited by the examiner do(es) not disclose the invention as it has been claimed. The patent appHcant s response should also comply with the examiner s request for correcting formal problems in the appHcation. 

Fig. 5. Example of U.S. patent classification (unstmctured, hierarchical). This is one of a series of classes considered as iategral parts of Class 260, foUowiag...

The Platinum Group Metal Reviews is a specialized review series focusiag on the new developments and uses of PGMs. Each issue also provides a brief description of recent patents issued ia the field. 

The first successful direct-arc electric furnace, patented by Heroult in France, was placed in operation in 1899. The patent covered single- or multiphase furnaces with the arcs placed in series through the metal bath. This type of furnace, utilizing three-phase a-c power, was historically the most common for steel production. 

Manufacture. Trichloromethanesulfenyl chloride is made commercially by chlorination of carbon disulfide with the careful exclusion of iron or other metals, which cataly2e the chlorinolysis of the C—S bond to produce carbon tetrachloride. Various catalysts, notably iodine and activated carbon, are effective. The product is purified by fractional distillation to a minimum purity of 95%. Continuous processes have been described wherein carbon disulfide chlorination takes place on a granular charcoal column (59,60). A series of patents describes means for yield improvement by chlorination in the presence of dihinctional carbonyl compounds, phosphonates, phosphonites, phosphites, phosphates, or lead acetate (61). 

In 1973, a multistage surface-fermentation process was patented in Japan for the production of acetic acid (42) eight surface fermenters were connected in series and arranged in such a way that the mash passed slowly through the series without disturbing the film of yAcetobacter on the surface of the medium. This equipment is reported to produce vinegar of 5% acidity and 0.22% alcohol with a mean residency time in the tanks of 22 h. 

Most of the fermentation and isolation processes for manufacture of the tetracyclines are described in patents (71,72). Manufacture begins with the cultivated growth of selected strains of Streptomjces in a medium chosen to produce optimum growth and maximum antibiotic production. Some clinically useful tetracyclines (2—4) are produced directly in these fermentations others (5—7) are produced by subjecting the fermentation products to one or more chemical alterations. The purified antibiotic produced by fermentation is used as the starting material for a series of chemical transformations (59). 

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