Appeal 2007-1565
Application 10/682,951
Findings of Fact
1. Drewes teaches polyvinyl chloride (PVC) compositions which have been
stabilized by epoxide compounds, perchlorates, and antioxidants (Drewes,
col. 1, ll. 3-5).
2. Example 33 (Drewes, col. 25, l. 55 to col. 26, l. 20 (Table IX)) describes
a composition containing NaClO4 (sodium perchlorate), Irgastab A 70
(aminocrotonate), and THEIC (tris-hydroxyethyl isocyanurate).
3. Sodium perchlorate is a halogen-containing salt of an oxy acid
(Specification 8-9).
4. Irgastab A 70 (aminocrotonate) is a compound of general formula I
recited in instant claim 1.
5. THEIC is an amino alcohol. (Specification 7-8, 33).
6. The PVC stabilized composition can include further additives, such as
metal soaps (Drewes, col. 11, ll. 3-5).
7. “Metal soaps are principally metal carboxylates” (Drewes, col. 12, l. 60).
“Customary examples are stearates” (Drewes, col. 12, l. 62). “Preference is
given to calcium, magnesium, and zinc carboxylates” (Drewes, col. 13, 35-
37).
8. The composition described in Example 33 (Drewes, col. 25, l. 55 to col.
26, l. 20 (Table IX)) comprises zinc stearate (Drewes, col. 26, l. 6). We
refer to this composition as “composition 33.”
9. Drewes describes PVC stabilized compositions which contain zinc
stearate (Drewes, col. 24, ll. 35-47, Examples 19-22 in Table VI).
10. Drewes describes PVC stabilized compositions which do not contain
zinc stearate, including Examples 16-18 (Drewes, col. 24, ll. 20-25 (Table
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Last modified: September 9, 2013