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 trademark protection last? Unlike copyrights and patents, trademark rights can last indefinitely as long as the owner continues to use the mark to identify its goods or services. The term of a federal trademark is 10 years, with 10-year renewal terms.