Still have questions about fair use exception? Here are several more helpful guidelines to help you make the appropriate decision.
The general guideline is that authors or creators keep copyright at least 70 years after their death. If a work is of corporate authorship, the copyright lasts 95 years from publication or 120 years from creation, whichever expires first.
You ask what percentage of a work is okay within the fair use exception. The following table might help. Continue reading