How to write the claim of invention patent?

(For details, see/%D5% C5% D9% D7/blog/item/53282a8c83b2d015b31bba9e.html) Article 56 of the Patent Law stipulates: "The scope of protection of the patent right for invention or utility model shall be subject to the content of its claim. The description and its drawings can be used to explain the claims. Therefore, the claims are legal documents used to determine the scope of patent protection for inventions or utility models. Whether the subject of a patent application belongs to the patentability scope, whether the invention and creation to be protected are novel, creative and practical, whether the patent application meets the requirements of oneness, and whether the implementation of others infringes the patent right depends on or is directly related to the content of the patent claim. Therefore, the patent claim is the most important document in the patent application for invention and utility model. Requirements for writing a patent claim: Paragraph 4 of Article 26 of the Patent Law, Articles 20 and 21 of the Detailed Rules for the Implementation of the Patent Law clearly stipulate the requirements for writing a patent claim, and the Examination Guide makes more specific provisions on this, which are now divided into two parts: substantive requirements and formal requirements. 1. Substantive requirements According to the provisions of the Patent Law and its implementing rules, the substantive requirements for writing a patent claim are: the patent claim is based on the specification; State clearly and concisely the scope of the requested protection. 2. In addition to the above substantive requirements, the formal claim shall also meet the following formal requirements: (1) If the claim contains several claims, it shall be numbered with Arabic numerals; (2) Where there are several independent claims, the subordinate claims shall be as close as possible to the cited claims; (3) Only one period is allowed at the end of each claim to emphasize that its meaning is an inseparable whole; (4) The technical terms used in the claim shall be consistent with those used in the specification; (5) There may be chemical formula, chemical reaction formula or mathematical formula in the claim, but there shall be no illustrations; (6) Unless absolutely necessary, similar terms such as "as described in the description" or "as shown in the figure" shall not be used in the claim; (7) tables are generally not allowed to be used in the claims, unless the object to be protected by the invention or utility model can be explained more clearly; (8) The technical features in the claim can refer to the corresponding reference signs in the attached drawings of the specification, but they must be enclosed in brackets, and the reference signs shall not be interpreted as limiting the protection scope of the claim; (9) Parentheses should be avoided as far as possible in the claims, except for reference symbols or other necessary circumstances; (10) When parallel selection is used in the claim, its meaning should be clear; (1 1) Generally speaking, a claim may not quote a person's name, place name, trade name or trademark name.