ALL US patents expire within a timeframe.
... are unenforceable... There are some patents that expire in less than 20 years and some that expire in more than 20 years, depending upon what you're trying to ask.
Yes. Patents usually expire approximately over a period of 20 years or may expire soon if the annual maintenance fee is not paid properly. A patent published in 1905 is expired and will now be in public domain.
Astro Orbiter is a ride at Disney's Magic Kingdom Park.
I would say The Great Movie Ride in Disney's Hollywood Studios.
The tallest ride is Disney MGM Studios is The Tower of Terror.
November 2011
Yes. They are initially good for 20 years, but may be renewed. In the USA and most other countries, expired patents cannot be renewed and the invention is permanently "public domain" property.
the movie ride
The concept of DVDs is not protected. The standards were developed by a consortium of companies now known as the DVD Forum.
Most Disney World tickets expire 14 days from activation (first use). Unless the tickets have the 'no expiration' option and then they will never actually expire.
They have patents in many different industries from the obvious web authoring, wireless, and email patents to the not-so-obvious patents in medical, vehicle, and weight loss. Some patents include, but are not limited to, IBM, The Weather Channel Inc., Nevengineering Inc., Wildtangent Inc., and Disney Enterprises Inc.