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![[Search a list of Patent Appplications for class 544]](../as.gif) Class 544 | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| This Class 544 is considered to be an integral part of Class 260 (see the Class 260 schedule for the position of this Class in schedule hierarchy). This Class retains all pertinent definitions and class lines of Class 260. | ||
| ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) |
 HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) |
![[List of Patents for class 544 subclass 1]](../ps.gif) | 1 |  Hetero ring is six-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) |
| | 2 |  Six-membered hetero ring consists of oxygen, sulfur, nitrogen and carbon (e.g., oxathiazines, etc.) |
| | 3 | Six-membered hetero ring consists of sulfur, nitrogen, and carbon |
| | 4 |  Heavy metal or aluminum containing |
| | 5 | Plural sulfurs in the six-membered hetero ring (e.g., dithiazines, etc.) |
| | 6 | Spiro |
| | 7 | Plural nitrogens in the six-membered hetero ring (e.g., thiatriazines, etc.) |
| | 14 | Polycyclo ring system having the six-membered hetero ring as one of the cyclos |
| | 31 |  Phenothiazine as three cyclos of polycyclo ring system having at least four cyclos |
| | 32 | Tricyclo ring system having the six-membered hetero ring as one of the cyclos |
| | 33 |  1,2- or 2,1-Thiazine ring in the tricyclo ring system (e.g., hydrogenated 1,2-benzothiazine in tricyclo ring system, etc.) |
| | 34 | Plural ring nitrogens in the tricyclo ring system |
| | 35 | Phenothiazines (including hydrogenated) |
| | 36 |  Purification or recovery |
| | 37 | Nitrogen bonded directly to phenothiazine ring system |
| | 38 | Carbon bonded directly to ring nitrogen of phenothiazine ring system |
| | 47 | Bicyclo ring system having the six-membered hetero ring as one of the cyclos |
| | 53 | 1,3-thiazines |
| | 56 | 1,4-thiazines |
| | 57 | Phosphorus containing |
| | 58.1 | Double bonded divalent chalcogen containing |
| | 58.2 | Divalent chalcogen double bonded directly to the thiazine ring |
| | 58.4 | Having -C(=X)-, wherein X is chalcogen, bonded directly to the thiazine ring |
| | 58.5 | Additional hetero ring containing |
| | 59 | Thiomorpholines (i.e., fully hydrogenated 1,4-thiazines) |
| | 63 | Six-membered hetero ring consists of oxygen, nitrogen and carbon (e.g., 1,2-oxazines, etc) |
| | 64 | Heavy metal or aluminum containing |
| | 65 | Plural oxygens in the six-membered hetero ring |
| | 66 | Plural nitrogens in the six-membered hetero ring |
| | 69 | Boron or silicon containing |
| | 70 | Spiro |
| | 72 | Plural oxazine rings |
| | 73 | Polycyclo ring system having oxazine ring as at least one of the cyclos |
| | 78 | Plural morpholine rings (i.e., plural fully hydrogenated 1, 4-oxazine rings) |
| | 79 | Polycyclo ring system |
| | 82 | Additional nitrogen containing hetero ring (e.g., thiazole, etc.) |
| | 84 | Phosphorus attached directly or indirectly to a morpholine ring by nonionic bonding |
| | 85 | Sulfur attached directly or indirectly to a morpholine ring by nonionic bonding |
| | 86 | Nitrogen attached directly or indirectly to a morpholine ring by nonionic bonding |
| | 87 | Oxygen attached directly or indirectly to a morpholine ring by nonionic bonding |
| | 88 | 1,3-Oxazines |
| | 89 | Polycyclo ring system having the oxazine ring as one of the cyclos |
| | 90 | Bicyclo ring system having the oxazine ring as one of the cyclos |
| | 91 | Three or more ring hetero atoms in the bicyclo ring system |
| | 92 | Chalcogen bonded directly to the oxazine ring |
| | 95 | Three or more ring hetero atoms in the polycyclo ring system |
| | 96 | Additional hetero ring containing |
| | 97 | Chalcogen bonded directly to the oxazine ring |
| | 98 | 1,4-Oxazines |
| | 99 | Polycyclo ring system having the oxazine ring as one of the cyclos |
| | 100 | Anthrone or anthraquinone in the polycyclo ring system |
| | 101 | Tricyclo ring system having the oxazine ring as one of the cyclos |
| | 105 | Bicyclo ring system having the oxazine ring as one of the cyclos (e.g., benzoxazines, etc.) |
| | 106 | Morpholines (i.e., fully hydrogenated 1,4-oxazines |
