useful

useful
The basic quid pro quo contemplated by the Constitution and the congress for granting a patent monopoly is the benefit derived by the public from an invention with substantial utility. Specific benefit must exist in currently available form. Brenner v. Manson, 383 U.S. 519, 534, 535, 86 S.Ct. 1033, 1041, 1042, 16 L.Ed.2d 69.
By "useful" is meant such an invention as may be applied to some beneficial use in society, in contradistinction to an invention which is illegal, injurious to morals or against public policy
@ useful life
In accounting and taxation, the period of time for which an asset is capable of being used for the production of income. For income tax purposes, the "useful life" of depreciable property is period over which asset may reasonably be expected to be useful to taxpayer in his trade or business or in production of income, and such is necessarily an estimate made at time when property is first put to use. Cohn v. U. S., C.A.Tenn., 259 F.2d 371, 377.
Useful life for depreciation purposes is an estimate; length of the useful period must be shown by evidence that allows it to be estimated with reasonable accuracy. Richard S. Miller & Sons, Inc. v. U. S., Ct.Cl., 537 F.2d 446, 455.
The term "depreciable life," as used in general excise tax law, is synonymous with the term "useful life" as used for purpose of the depreciation deduction under income tax law. Matter of 711 Motors, Inc., 56 Hawaii 644, 547 P.2d 1343, 1347
@ usefulness
Capabilities for use. The word pertains to the future as well as to the past
@

Black's law dictionary. . 1990.

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  • Useful — Use ful, a. Full of use, advantage, or profit; producing, or having power to produce, good; serviceable for any end or object; helpful toward advancing any purpose; beneficial; profitable; advantageous; as, vessels and instruments useful in a… …   The Collaborative International Dictionary of English

  • useful — index applicable, beneficial, constructive (creative), contributory, convenient, disposable, effective ( …   Law dictionary

  • useful — 1590s, from USE (Cf. use) (n.) + FULL (Cf. full). Related: Usefully; usefulness …   Etymology dictionary

  • useful — [adj] beneficial, valuable advantageous, all purpose, applied, appropriate, brave, commodious, convenient, effective, favorable, fit, fruitful, functional, good, handy, helpful, instrumental, meet, of assistance, of service, of use, practicable,… …   New thesaurus

  • useful — ► ADJECTIVE 1) able to be used for a practical purpose or in several ways. 2) informal very able or competent. DERIVATIVES usefully adverb usefulness noun …   English terms dictionary

  • useful — [yo͞os′fəl] adj. that can be used to advantage; serviceable; helpful; beneficial; often, having practical utility usefully adv. usefulness n …   English World dictionary

  • useful — use|ful W1S1 [ˈju:sfəl] adj helping you to do or get what you want ≠ ↑useless ▪ The book is full of useful information. ▪ Bar charts are a useful way of looking at sets of figures. ▪ The Internet is becoming a useful tool for investors. useful… …   Dictionary of contemporary English

  • useful */*/*/ — UK [ˈjuːsf(ə)l] / US [ˈjusf(ə)l] adjective Get it right: useful: Although the adjective full ends with a double l , adjectives like useful have only one l : Wrong: Find a more usefull spare time activity than driving around in a car. Right: Find… …   English dictionary

  • useful — use|ful [ jusfəl ] adjective *** helpful for doing or achieving something: Here s some useful information about travel in Canada. a useful tool/technique/gadget Her book is a useful contribution to our understanding of how Mozart worked. useful… …   Usage of the words and phrases in modern English

  • useful — adj. VERBS ▪ be, look, prove, seem ▪ become ▪ make yourself ▪ She told Fred to make himself useful …   Collocations dictionary

  • useful — / ju:sfFl/ adjective 1 helping you to do or get what you want: useful information | Dean s a really useful person to have around when things go wrong. | useful to sb: information that may be useful to the enemy | useful for sth: These yellow… …   Longman dictionary of contemporary English

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