The chemist and druggist, 15. September 1859
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ROYAL LEr^ ^ Office—T^, OHAITOERY Hj-A-ISTE, ZLOlSTDOISr PATENTS FOR THE BRITISH DOMINIONS. The Grantees or Proprietors of Letters Patent for the United Kingdom may make separate assignments of their privileges in regard to England, Scotland, or Ireland, as if their Patents had been originally granted to extend to either country alone. All transactions respecting the assignment of such Letters Patent, of any share or interest therein, or Licenses thereunder, are ineffectual unless through Registration in Chancery, which will be entered on application at this Office, where also all requisite information may be obtained respecting the proprietor- ship of any Patented Invention. A Patent can be obtained either for a new Invention or an Improvement upon an old one, or for the introduction of an Invention known or in use in foreign countries, provided always that such Invention or Improvement have not before been published or practised within these realms. All Patents arc granted for the term of Fourteen Years, but may become void at the expiration of the Third or Seventh Year, by non-payment of the duties. All Patents are dated as of the day of application. A Provisional Protection for six months, with power to use, sell, or dispose of the Invention, may be obtained, by ap- plication for Letters Patent, under a Provisional Specification (see Specifications), for six to Eight Guineas. The remaining charges for completing a Patent, which may be effected in from seven to eight weeks, amount to Twenty Pounds, exclusive of the " Specification in pursuance of the conditions of Letters Patent." The Stamp Duties required to maintain a Patent are— At or before the expiratiun of the Third Year £50 0 0 At or before the expiration of the Seventh Year 100 0 0 SPECIFICATIONS. Every application for Letters Patent must be accompanied with a provisional or complete Specification. The applicant, who employs a Provisional Specification, reserves to himself the right of making further improvements or additions to his Invention during the term of six months, in which his Patent is to be completed. The Provisional Specification therefore only requires a brief outline of the nature of the Invention. The validity of Letters Patent depends on the accuracy of the final or complete Spe- cification ; for the Crown, in granting to Inventors an exclusive monopoly for a limited period, (for any violation of which a party may be punished), requires that a true and particular description of the Invention be given, so that any person may, by simple examination, ascertain its real nature. The information to be forwarded to the Office requisite for a Specification should be true, full, clear, and exact, giving names, quantities, and proportions, with accuracy and precision, distinguishing new from old, and directing how to make, use, exercise, and put into practice the Invention ; full particulars being required, in order that the Specification be filed in the most valid and perfect form. In the preparation of Specifications, drawings (of which duplicates are always required) are considered a most important feature, and when referred to in the description of a Patent may render valid a Specification which would otherwise be defective. The cost of a Specification varies in amount according to the length of the description, and the- number and intricacy of the drawings ; but an average sum for a Specification not in- volving extreme complexity in the details, and requiring only ordinary illustration, may be stated at from Twelve to Eighteen Pounds, inclusive of Stamp Duties and all other charges. FOREIGN PATENTS. In France, Belgium, Holland, and most of the Continental States, Patents (which may be obtained for a period of five, ten, or fifteen years) are divided into three classes : namely, for "Inventions," "Improvements," and "Importations;" but no difference exists in the cost or conditions of the grant. The costs of Foreign Patents depend upon the country and number of year* for which they are required, together with the length of Specification and intricacy of the drawings, and vary in amount from Ten to Fifteen Pounds, including the tax and all other charges. All Communications to be addressed, and Money Orders made payable to BALDWIN FULFORD WEATHERDON, Patent Office, 77, Chancery Lane, London. Office Hours, from Ten (ill Four.