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Our patents claim the structures of the following seven different classes of vector-directional polymers [see Note #1].  Illustrations of the top two are provided; the rest are available on request.

1. Iminol (and aramid) polymers

This polymer class is defined by aramid linkages.  This is a two-atom linkage, one nitrogen atom and one carbon atom.  Four total bonding groups are required per linkage, two of which form the covalent linkage and the other two of which are required to stabilize this linkage into one thermodynamically favored conformation. This conformation can be either the aramid tautomer (molecular arrangement), where the linkage double bond is mostly between the linkage carbon and adjacent oxygen atom (not shown), or it can be the iminol tautomer (shown), where the double bond in the linkage is mostly between the carbon and nitrogen atoms.

2. Aminoenol polymers (aka, phenylacetate-analog polymers)

This polymer class involves a three-atom linkage, two of which are carbon atoms and one of which is a nitrogen atom. Conformational stability requires two extra bonding features and one isomerization.

3. Guanidine-analog polymers (carbonate-analog polymers)

This class also uses a three atom linkage, but with two nitrogen atoms and one carbon atom.  Two extra bonding features are required to stabilize it.

4. Zero-atom-linkage polymers (heterocycle fusion polymers)

With ring closure, there are no linkage atoms (because the rings connect directly).  Stability requires two stabilizing bonding features, one of which is inherent in the just-formed heterocyclic ring.

5. Phenol-oxazole, phenol-thiazole and mercaptothiazole polymers

Bisoxazoles (benzobisoxazoles) are the prototypical example of this class (see right).  Four bonding features are required, two of which form the initial (step-one) linkage, and the third of which condenses with the first two into the final (step-two) covalent linkage.  This leaves the last bonding feature to stabilize the linkage in its thermodynamically favored conformation.

6. Iminether polymers (aromatic and aliphatic)

Iminether polymers are variations on aramid/iminol polymers in which a covalent ring takes the place of the hydrogen-bond acceptor.  Four bonding groups are required, three of which are involved in the covalent structure and one of which forms a hydrogen bond.  There are two versions of this linkage, one in which the formed covalent ring has an aliphatic carbon atom, which has the potential for a small amount of twist, and the fully aromatic ring, which requires an isomerization step.

7. Boron-variant polymers

The boron-variant polymers comprise two classes, 1) those that involve carbon-to-boron substitution within the linkage (boron ester polymers), and 2) those that involve a boron heteroatom (boron heterocycles).

Note #1: Some non-vector-directional versions of the above vector-directional polymers have been patented elsewhere or described in public-domain literature. These are not believed to be relevant to this art by the inventors, authors or US Patent Office examiners.

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