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Patents have a maximum life of 20 years and, therefore, a 20-year potential monopoly. Patents that are just beginning their life and which have longer to run on the their potential monopoly position understandably will have more value. It is rare that a patent nearing the end of its term will cause a great threat to its competitors. It is almost certain that they will have devised technologies or products of their own by then that will not interfere with the patent owners monopoly position. In addition, one has to take into consideration the potential business life of a patent, i.e., the duration, which a patent is likely to be economically useful, if other subsequent patents are providing better alternatives to it.

Conducting a thorough patent search is difficult, particularly for the novice. Patent searching is a learned skill. A novice in the United States could contact the nearest Patent and Trademark Depository Library (PTDL) and seek out search experts to help in setting up a search strategy.

In your written patent application you must fully describe your invention to such a degree that a person skilled in the same field as the invention could make or use that invention. A person skilled in the same field as the invention should be able to read your patent application and understand it. The inventor must be able to make claims about his/her invention in clear and definite terms.The part of a patent application that describes and reveals your invention is called the specification and includes various types of descriptions, claims, and drawings depending on the type of invention and type of patent involved. Remember, ideas alone cannot be patented. In other words - you can't just write, "I have an idea for a new alarm clock." You must be able to describe how your alarm works so that an expert in alarm clocks would understand how it would work and that it would indeed work. It's like a recipe ... a good cook should be able to produce your invention based on your patent. As a novice, to file your first patent application yourself is often unwise. However, you could write your own descriptions and then pass them over to your attorney. The attorney could use your writings as a guide and a time-saver, and that will save you money. You should present your inventor's logbook, prototype, and any prior art searches to the attorney. You must write a complete and thorough description of your intellectual property as you cannot add any new information to your patent application once it is filed. You can only make changes to the subject matter that could be reasonably inferred from the original drawings or description.