US PATENT SUBCLASS 540 / 320
.~.~.~.~.~.~.~.~.~.~.~ Formation of solvate or anhydrous forms, or special crystalline forms

Current as of: June, 1999
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540 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS {6}
200  DF  .~.~ Hetero ring is four-membered containing nitrogen and having chalcogen double bonded directly to a ring carbon which is adjacent to the ring nitrogen {7}
203  DF  .~.~.~ Polycyclo ring system containing the hetero ring as one of the cyclos {4}
302  DF  .~.~.~.~ The ring nitrogen is shared by a five-membered ring {2}
303  DF  .~.~.~.~.~ The five-membered ring contains an additional hetero atom {2}
304  DF  .~.~.~.~.~.~ 1-thia-4-aza-bicyclo(3.2.0)hep-tane (including unsaturated; e.g., penam, etc.) {6}
310  DF  .~.~.~.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly at the 3-position of the bicyclo ring system {2}
312  DF  .~.~.~.~.~.~.~.~ Nitrogen bonded directly at the 6-position of the bicyclo ring system {3}
314  DF  .~.~.~.~.~.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, single bonded directly to the nitrogen (e.g., penicillin F, etc.) {9}
315  DF  .~.~.~.~.~.~.~.~.~.~ Processes utilizing penam containing compound {8}
320.~.~.~.~.~.~.~.~.~.~.~ Formation of solvate or anhydrous forms, or special crystalline forms

DEFINITION

Classification: 540/320

(under subclass 315) Processes for the formation of solvate or anhydrous forms, or the formation of special crystalline forms.

(1) Note. Included herein are those processes which effect (a) the formation of hydrate adducts and (b) the modification from the usual crystalline form of a penam compound to another crystalline form.