If by "script" you mean "screenplay", you can't get a patent on it. You should be trying to get a copyright.
Technically, if your script has been written, it's already protected by U.S. copyright law. Once any original work of authorship is fixed into any tangible medium (in this case, once it's written down), it is protected by copyright.
However, to get many substantive protections, you should register your work with the U.S. Copyright Office (see related links). For clarification, you can also see the related links for explanations of the difference between copyright and patent.
Unless someone has already done it and holds patent rights for the product, you are free to sell your own piece of work.
A patent is a grant from a patent office, such as the United States Patent Office. "Patent Pending" is a phrase that an application for a patent has been filed and is in some stage in the process of obtaining a patent. Thus, a patent can be presently enforced while a patent that is merely pending is unenforceable but can mature into a patent that can be enforced. Once the pending patent matures, the patent owner can sue for back damages or reasonable royalties starting from the filing date of the patent.
There are not training offered from the patent office on getting a patent. The patent office advises you to seek guidance from a trademark/patent attorney. A good attorney is highly suggested by the patent office. As a convenience, they have a roster of local Patent Attorneys.
Patent revocation is the removal of patent protection from an invention.
To cite a patent in APA format, include the inventor's name, the patent number, the title of the patent, the publication date, and the source of the patent. Format it as follows: Inventor(s). (Year). Title of patent (Patent No. xxxxxx). Source.
If it is a U.S. patent, you can go to the USPTO website for patent searches and enter the number in "patent number search".
A provisional patent provides temporary protection for an invention, while a non-provisional patent offers full patent protection and must be examined by the patent office.
No, there is not and cannot be such a patent.
There are many companies out there that will tell you how to get a patent, however, most are scams. You can apply for a patent with the US Patent Office at www.uspto.gov.
An improvement of an existing invention is itself an invention, and can be patented like any other invention. Contact a patent practitioner (patent agent or patent attorney) for assistance. The United States Patent and Trademark Office has lists and addresses of patent practitioners in every state. Avoid companies that advertise they will "help you get a patent."
Patent pending is a warning that a patent application has been filed. It is completely worthless until and unless a patent is actually issued for that invention. Patent number notice means a patent with that number was issued for the invention that is implemented in the product labeled with that number.
A blocking patent is a patent relating to a particular area of technology which prevents another patent from being used because the other patent relies on technology covered by the first.