n. 31

Cross-references and search-notes. 31

16. Impossibility of cross-referencing all disclosures. 31

17. Occasion and direction of cross-referencing. 31

18. Occasion and scope of search-notes. 32

Diagnosis to determine classification. 32

19. Patents diagnosed by claimed disclosure. 32

20. Patents diagnosed by most intensive claim. 33

21. Exception to rule 19, claim, for a part of a disclosed
combination. 33

22. Exception to rule 19, claims for a part of a disclosed
combination. 33

23. Exception to rule 19, generic combination old as matter
of common knowledge. 34

24. Exception to rule 19, article of manufacture defined
only by material. 34

25. Exception to rule 19, utilizing a composition. 34

26. Exception to rule 19, utilizing a machine. 34

27. Patents having claims for several different
inventions. 35

28. General rule of superiority between statutory kinds of
invention. 35

29. Exception to rule 28. 35

30. Process and apparatus. 36

31. Article of manufacture and instrument for making a part
of it or performing any minor act relative thereto. 36

32. Process and product where search for the process would
have to be made among machines. 36

33. Process and product where search for the process would
have to be made among products. 36

34. Process of making a composition and the composition
where the process is peculiarly adapted to make the
composition. 37

35. Article of manufacture or composition and process for
making one of the parts of the article or ingredients of
the composition. 37

D. Procedure in reclassifying within examining divisions.