A more thorough explanation:

Definition: Secondary consideration refers to factors that are not directly related to the invention itself, but may still be considered when evaluating its patentability. These factors can include commercial success, long-felt but unsolved needs, and unexpected results.

Examples:

• Commercial success: If a product has been successful in the market, this can be considered a secondary factor in determining its patentability. For example, if a new type of smartphone has sold millions of units and has become a cultural phenomenon, this could be seen as evidence that the invention is novel and non-obvious.
• Long-felt but unsolved needs: If there has been a long-standing problem in a particular industry or field, and an invention comes along that solves that problem, this can be considered a secondary factor in determining its patentability. For example, if a new type of battery is invented that lasts much longer than previous batteries, and there has been a need for such a battery for many years, this could be seen as evidence that the invention is novel and non-obvious.
• Unexpected results: If an invention produces unexpected or surprising results, this can be considered a secondary factor in determining its patentability. For example, if a new type of fertilizer is invented that not only increases crop yields, but also makes the crops more resistant to pests, this could be seen as evidence that the invention is novel and non-obvious.

These examples illustrate how secondary considerations can be used to support the patentability of an invention, even if the invention itself may not be completely novel or non-obvious on its own.