Design Patents Are Granted for a Period

question 5

Multiple Choice

Design patents are granted for a period:

• A) less than 20 years.
• B) from 20 to 30 years.
• C) from 30 to 40 years.
• D) from 40 to 50 years.

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Definitions:

(-)-glyceraldehyde

A specific stereoisomer of glyceraldehyde, a simple sugar molecule that serves as an intermediate in several metabolic pathways.

(+)-glyceraldehyde

An enantiomer of glyceraldehyde, denoted as having a positive optical rotation; it is a simple sugar and plays a role in several metabolic pathways.

E.e.

Enantiomeric excess, a measure of the purity of an enantiomer in a mixture, indicating the percentage difference between two enantiomers' concentrations.

Asymmetric Carbon

A carbon atom bonded to four different groups, creating a chiral center.