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Patent Drafting

1. About 70% of our patent attorneys have master's degree or above, we can provide patent drafting service in Chinese, English, Japanese and German. The professions of our patent attorney covers mechanics, electronics, biology, chemistry, telecommunication, software.
2. Requirements on Drafting of Claims
Each claim shall have only one full stop at its end, since the extent of protection of a claim is defined by the contents therein as a whole.  If there are several claims, the claims shall be numbered consecutively in Arabic numerals.
The technical terms used in the claims shall be consistent with those used in the description. The claims may contain chemical formulae or mathematical formulae but shall contain no drawings. Unless absolutely necessary, the claims shall not contain such expressions as “as described in ... of the description”, or “as shown in figure or the like. The situation “absolutely necessary” refers to the situation where a specific shape involved in an invention or utility model cannot be defined with words but only by drawings, in which case the phrase “as shown in figure or the like can be used in the claims.
Usually, a claim shall not contain table, unless using table can define the subject matter of an invention or utility model more clearly.
Technical features in a claim may cite corresponding reference signs in the drawings to facilitate the understanding of the solution as in the claim. Such reference signs shall be placed in parentheses and after the corresponding technical features. Reference signs shall not be construed as limiting the extent of protection of the claim.
Generally, a claim shall be presented in one paragraph. However, where there are many technical features, the contents and the interrelations are complicated, and it is difficult to clarify the relations by punctuation, a claim may also be presented in separate lines or several paragraphs.
Usually, an open claim should use the transition phrase of “containing”, “including”, or “consisting essentially of , which shall be interpreted as including additional components or process steps non-recited in the claim is permitted. A closed claim should use the transition phrase of “consisting of , which shall normally be interpreted as not including any component or process step other than those set forth in the claim.
Where a claim involves a numerical range, generally the range shall be presented as far as possible in mathematical expression, such as “ 30℃”, “ > 5”, etc. Normally, “more than”, “less than”, “exceed” and the like shall not be construed as including the number itself; “no less than”, “no more than”, “within” and the like shall be construed as including the number itself.
It is permissible to define an invention or utility model in the claims by generalization, provided that the claims are supported by the description. Generalization could be done by the following two means:
(1) by means of generic terms. For example, “gas laser” may be used to generalize over He-Ne laser, Argon ion laser, carbon monoxide laser, and carbon dioxide laser etc.,” C1-C4 alkyl” to methyl, ethyl, propyl, and butyl groups, and “belt drive” to flat belt drive, vee belt drive, and odontoid belt drive etc.; or  (2) by means of parallel options, i. e. , by connecting several parallel features with the conjunction word “or” or “and”, among which at least one option must be chosen. Examples include “feature A, B, C, or D”, and “a substance selected from the group consisting of A, B, C, and D”.
In generalization by means of parallel options, the specific options being put in parallel shall be comparable with each other in content. A generic term cannot be connected in parallel with a specific term by the conjunction “or”. Moreover, the meaning of the parallel options shall be clear. For example, in the expression “A, B, C, D, or the like (equipment, process, substance) “, the meaning of the option “the like” is unclear, therefore it cannot be placed in parallel with the specific products or processes (A, B, C, D).

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