A grant from the federal government conferring the rights to exclude others from making, selling, or using an invention for a specific period of time is referred to as a patent. The patent may refer to a new process, a new device, a new product or a refinement or improvement thereof. The duration of the Patent varies according to the state where it is being processed, the item and the need for its use.
The correct answer is B.
A mineral is defined as a naturally occurring substance that has a definite chemical composition and crystal structure.
In order for a substance to be called a mineral, it must have all the four characters described in the definition.
- a mineral is always a solid and has a definite shape and volume.
- most minerals are made of two or more elements chemically combined to form a compound. It may also be made of a single element e.g. gold, copper or sulphur.
- all minerals have a characteristic crystal structure.
- minerals are grouped according to their chemical composition or makeup
The city of San Antonio, Texas goes back 300 years. It's where the Spanish claimed the New World and set up missions to colonize the indigenous people. Today, it's a multicultural metropolis that celebrates its Hispanic heritage through historic neighborhoods, traditional food, and unique festivals
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