Lines with other classes and within this classSPECIAL LINES WITH CLASS 29, METAL WORKING Class 29 has several important relationships with this class (156). Both classes take designated single-step processes, and both are locations for multistep processes for manufacturing designated products or using certain combinations of steps. Single-step processes provided for in Class 29 include shaping particulate metal by pressure alone, burnishing, filing, mechanical joining of parts, etc., even when used in the manufacture of a product designated for Class 156, in section I, above. Likewise, where only an adhesive bonding step is claimed, the process is assigned to Class 156, even though a product designated for Class 29 is manufactured. Multistep processes for Class 29 are of two types: (1) Those for making specified articles, enumerated in that part of the Class 29 subclass 401.1. (2) Multistep manufacturing processes not provided for elsewhere. Insofar as processes of type (1) are concerned, these are assigned to Class 29, even when an adhesive bonding step is claimed as part of the multistep process, except for processes classifiable in subclasses 825+, which follows the category (2) rule given in the next paragraph. Processes of type (2) are provided for in this class (156) when they claim: (a) Adhesive bonding combined with shaping of nonmetals. (b) Adhesive bonding combined with broad or nominally claimed metal shaping steps. (c) Adhesive bonding including steps for assembling the parts to be bonded. Processes of type (2) are classified in Class 29 when they claim: (a) Adhesive bonding combined with specified metal shaping steps. (b) Adhesive bonding combined with mechanical joining, either broad or specific. A. Bonding And/Or Assembly Therefor. 1. This class provides for the adhesive securing of parts utilizing nonmetallic cementing media. The adhesive may be separately applied tacky material, or it may be a nontacky material on application that is subsequently activated. The parts joined may be inherently tacky without the addition of an adhesive or may be rendered tacky by the application of an activating material or agent. 2. This class provides for process for assembling adhesive coated or tacky parts even though the step of applying the adhesive may not be claimed. Assembly or association of articles for subsequent bonding or adhesive applying where the subsequent bonding is not claimed is generally not provided for in this class. Any step in addition to the assembly, however, which might be considered to be unique to adhesive bonding is sufficient to cause the patent to be classified in this class. 3. This class provides for apparatus for assembling and joining of parts. Generally it is required that the apparatus include means to bring the parts into assembled association and that the parts have adhesive applied to them or means be claimed to apply adhesive or render the parts adhesive. This class generally does not provide for apparatus for bringing parts together for subsequent adhesive application where such application is not claimed. Appropriate classes are listed in References to Other Classes, below. Class 29, Metal Working, especially provides for such devices. B. Laminating Combined With Other Operations 1. This class provides for the combination of laminating with other working steps, however other classes provide for laminating for the manufacture of specific articles, or particular operations combined with laminating steps. See References to Other Classes, below, referencing this section. C. Chemical Manufactures 1. Etching apparatus in general is provided for in Class 134, Cleaning and Liquid Contact With Solids, except apparatus for (a) applying etchant to a restricted portion of a product or (b) causing the etchant to be applied differently to different areas of the product Class 156 (subclasses 345.1-345.55). Attention is directed to the search notes of these subclasses for the locus of other art relating to this subject matter. Processes and apparatus for electrolytic etching are provided for in Class 204, Chemistry: Electrical and Wave Energy. 2. Class 430, Radiation Imagery Chemistry: Process, Composition, or Product Thereof, Class 427, Coating Processes, and Class 264, Plastic and Nonmetallic Article Shaping or Treating: Processes, generally provide for chemical reactions which take place during photos:graphic imaging, coating or molding steps, respectively. Where etching is employed merely to prepare a surface for some subsequent operation, e.g., coating, welding, etc., the patent to the combination is classified with the subsequent operation. Also, imaging or coating combined with subsequent chemical etching is provided for in Class 430 or 427, while molding combined with subsequent reactive gas or vapor treatment is provided for in Class 264. 3. Class 29, Metal Working, provides for its own operations when combined with a coating step or a molding step. See also "A. Bonding And/Or Assembly Therefor" above. See References to Other Classes, below, referencing this section. D. Single-crystal Growth 1. This subject matter is located in Class 117, Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor. E. Products This class does not provide for products of manufacture. Class 428, Stock Material or Miscellaneous Articles, in appropriate subclasses provides for the products resulting from the processes of this class where not elsewhere provided for. For the classification of other articles, attention is directed to the "Index to Classification". LINE WITH CLASS 228 AND CLASS 219 See Class 228, Metal Fusion Bonding, appropriate subclasses for joining of parts by metallurgical bonding and also see Class 219, Electric Heating, for welding of metals by electric heating. (For apparatus bringing parts together for adhesive application, not claiming application) | 
Quotables 
PatentStorm News
Patents 
