We started out with three each of three different types of plants: one member of each set was given water that had been boiled on a gas stove, water that had been boiled in a microwave oven, or water that had not been boiled at all.
Drug patent protection: How long is long enough? A recent Senate committee hearing on Bill S-17, Parliament's effort to comply with international trade rules by extending pharmaceutical patent protection to 20 years, inadvertently opened the door to a broader investigation of the inner workings of the country's pharmaceutical patent legislation.
How Long Does Patent, Trademark or Copyright Protection Last?How Long Do IPR Rights Last? A U.S. utility patent, explained above, is generally granted for 20 years from the date the patent application is filed; however, periodic fees are required to maintain the enforceability of the patent. A design patent is generally granted protection for 14 years measured from the date the design patent is granted. A U.S. trademark generally lasts as long as the trademark is used in commerce and defended against infringement. Copyright protection is for a limited term. For works created after January 1, 1978, copyrights last for 70 years after the death of the author.