美國專利局算是對超項、多重附屬項等費用最在意的專利局
有人問起，這些費用怎樣算？
找到USPTO的文件，其中提到一些除了「基本費用」以外的額外超出費用的規定
基本費用就是指在權利範圍總項次20項/獨立項3項的範圍內的費用
其餘超出費用則是額外計算，不在這基本費內，包括：
(1)超出20項範圍的超項費、(2)超出的獨立項再收一次、(3)多項附屬項再收一次、(4)比申請日晚到的申請費
也就是說，(1)(2)(3)(4)的費用是在基本費之外多收的，並不算在基本費內
[參考原文]
一般專利申請費包括35 U.S.C. 111規定的說明書、圖示與宣誓書費用，費用是否完備無缺也影響申請日的建立
The filing fee includes the basic fee, excess claims fees (if any), and the multiple dependent claim fee (if any), for claims present on filing (unless the excess or multiple dependent claims are canceled before the filing fee is paid). Of course, if the basic filing fee is received on a date later than the filing date assigned the application filed under 35 U.S.C. 111, a surcharge as set forth in § 1.16(e) is also required.
另在35 U.S.C. 371 and 37 CFR 1.494 or 1.495.規定國際申請案(PCT)的費用，進到美國國家階段的申請費用同樣也有(1)超項費、(2)多重附屬項等超出的費用
35 U.S.C. 371 provides for the national stage filing of a patent application under the Patent Cooperation Treaty. The basic national fee for an international application entering the national stage is due not later than the expiration of 20 months from the priority date in the international application (or 30 months from the priority date if the United States was elected prior to the expiration of 19 months from the priority date). The amount of the basic national fee that is required to be paid is the basic national fee in effect on the date the full fee is received. The excess claim fees or the multiple dependent claim fee is the higher of:
(1) the excess claims fees and the multiple dependent claim fee in effect on the
date the PTO receives the basic national fee; or
(2) the excess claims fees and the multiple dependent claim fee in effect on the
date the PTO receives (any of) these fees.
In this respect, the practice for determining the fees due for excess claims and any multiple dependent claim when entering into the national stage is analogous to the practice for applications filed under 35 U.S.C. 111.
Fees for claims which are added after entry into the national stage are determined by the fees in effect (for excess claims and multiple dependent claim) on the date the PTO receives the fee(s).
Ron
資料參考：
http://www.uspto.gov/web/offices/ac/qs/ope/feefly11.htm
