How does the USPC system handle perfecting features in patent classification?
The United States Patent Classification (USPC) system recognizes perfecting features as an important aspect of patent classification. According to MPEP 903.02(b), perfecting features are defined as follows:
“Features may be added to the basic subject matter which do not change the character thereof, but do perfect it for its intended purpose; e.g., an overload release means tends to perfect a stonecrusher by providing means to stop it on overload and thus prevent ruining the machine.”
Key points about perfecting features in the USPC system:
- They enhance the basic subject matter without changing its fundamental character.
- They improve the functionality or performance of the invention for its intended purpose.
- Perfecting features are considered in combination with the basic subject matter during classification.
When classifying patents, examiners must consider these perfecting features to ensure accurate classification and effective prior art searches.
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