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| Number | Title | Issue Date |
| 4729892 | Use of cross-linked hydrogel materials as image contrast agents in proton nuclear magnetic resonance tomography and tissue phantom kits containing such materials Cross-linked hydrogel materials in the swollen state exhibit a range of nuclear magnetic resonance spin density values, spin-lattice or longitudinal relaxation (T1) values, and spin-spin or transverse relaxation (T2) values embracing... | 03/08/1988 |
| 4544545 | Liposomes containing modified cholesterol for organ targeting Phospholipid liposomes are provided having an outer layer including a cholesterol derivative such as a cholesterol ester and an aqueous medium confined by the layer which includes a tracer agent, a cytoxic agent or a therapeutic agent. The liposomes are a... | 10/01/1985 |
