Guidelines for Examination in the EPO

Guidelines for Examination - Table of Contents

PART C GUIDELINES FOR SUBSTANTIVE EXAMINATION

CHAPTER II CONTENT OF A EUROPEAN PATENT APPLICATION (OTHER THAN CLAIMS)

CHAPTER II Annex UNITS RECOGNISED IN INTERNATIONAL PRACTICE AND COMPLYING WITH RULE 49(11) (see II,...

4. Units and names of units permitted in specialised fields only

3. Units used with the SI, and whose values in SI are obtained experimentally

4.	Units and names of units permitted in specialised fields only

Quantity	Unit
	Name	Symbol	Value
Vergency of optical systems	Dioptre		1 dioptre = 1 m-1
Mass of precious stones	metric carat		1 metric carat = 2 x 10-4 kg
Area of farmland and building land	are	a	1 a = 102 m2
Mass per unit length of textile yarns and threads	tex	tex	1 tex = 10-6 kg.m-1
Blood pressure and pressure of other body fluids	millimetre of mercury	mm Hg	1 mm Hg = 133,322 Pa
Effective cross-sectional area	Barn	b	1b = 10-28 m2

The prefixes and their symbols listed in 1.3 may be used in conjunction with the above units and symbols, with the exception of the millimetre of mercury and its symbol. The multiple of 102 a is, however, called a "hectare".

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Guidelines for Examination in the EPO