US PATENT SUBCLASS 508 / 245
.~.~.~ Chalcogen in the hetero ring


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



508 /   HD   SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARATE COMPOSITIONS FOR MOVING SOLID SURFACES, AND MISCELLANEOUS MINERAL OIL COMPOSITIONS

110  DF  LUBRICANTS OR SEPARANTS FOR MOVING SOLID SURFACES AND MISCELLANEOUS MINERAL OIL COMPOSITIONS (E.G., WATER CONTAINING, ETC.) {53}
243  DF  .~ Heterocyclic ring compound; a heterocyclic ring is one having as ring members only carbon and at least one hetero atom selected from nitrogen and chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) {4}
244  DF  .~.~ The hetero ring contains six members including nitrogen and carbon (e.g., pyridine, picoline salts, etc.) {7}
245.~.~.~ Chalcogen in the hetero ring {2}
246  DF  .~.~.~.~> The chalcogen is oxygen (e.g., oxazines, etc.) {4}
251  DF  .~.~.~.~> Polycyclo ring system which contains the hetero ring as one of the cyclos (e.g., phenothiazines, etc.) {3}


DEFINITION

Classification: 508/245

Chalcogen in the hetero ring:

(under subclass 244) Compositions wherein the hetero ring with carbon and nitrogen ring members also has chalcogen

(i.e., oxygen, sulfur, selenium, or tellurium) as a ring member.

(1) Note. Examples of components provided for herein are [figure]