United States Patent: 3825490 ( 1
Issue Date:
U.S. patent number [Application Number ] was granted by the patent office on 1974-07-23 for united states patent: 3825490 ( 1.
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| United States Patent | 3,825,490 |
| Issue Date: | July 23, 1974 |
| Current U.S. Class: | 208/310Z; 208/310R; 585/738; 585/822; 585/826; 208/48R; 208/361; 585/820; 585/825; 95/114; 95/143 |
| Current CPC Class: | B01D 53/04 (20130101); C07C 7/13 (20130101); B01D 53/02 (20130101); C10G 25/12 (20130101); C10G 25/03 (20130101); B01D 2256/24 (20130101); B01D 2259/403 (20130101) |
| Current International Class: | B01D 53/02 (20060101); B01D 53/04 (20060101); C07C 7/13 (20060101); C07C 7/00 (20060101) |
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