Appeal 2007-1366
Application 90/005,090
1 F. 35. TMCS has the formula (CH3)3SiCl and meets Quaal’s definitions of R
2 and X where R is methyl (-CH3) and X is Cl.
3 F. 36. Quaal teaches that the cohydrolysis is preferably carried out in a
4 water-solvent mixture but the solvent is characterized as “not essential
5 to the process.” Quaal, 1:55.
6 F. 37. Quaal also teaches that the amount of water is not critical but should
7 be sufficient to allow the reaction to proceed at a satisfactory rate.
8 Quaal, 1:51-53.
9 F. 38. Quaal’s Example 1 describes a method of making TRIS. Quaal 2: 3-
10 33.
11 F. 39. Quaal’s Example 1 describes the cohydrolysis of MAS, TMCS and a
12 third compound (CH3)3SiOCH3 to form TRIS. Quaal, Example 1,
13 2:4-30.
14 F. 40. (CH3)3SiOCH3 is also a compound having the formula R3SiX meeting
15 Quaal’s definitions of R and X.
16 F. 41. A mixture of MAS, TMCS, and (CH3)3SiOCH3 is added to a mixture
17 of water and ether and stirred overnight. Quaal, Example 1, 2:12-17.
18 F. 42. The mole weight of MAS is 248 grams.
19 F. 43. The mole weight of TMCS is 108 grams.
20 F. 44. The mole ratio of MAS (248 grams) to TMCS (325.5 grams) in the
21 mixture is 1:3.0.
22 F. 45. The water was removed using a separatory funnel. Quaal, 2: 17-19.
23 F. 46. The remaining layer was washed and subject to vacuum drying and
24 vacuum distillation to obtain TRIS. Quaal, 2: 25-28.
25 F. 47. The TRIS was apparently reasonably pure as indicated by the
26 comparison of the theoretical percentages of C, H and Si with the
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