Xu; Helen
Patent Applications and Registrations
Patent applications and USPTO patent grants for Xu; Helen.The latest application filed is for "midstream urine collection".
- Xu; Helen - Philadelphia PA
- Xu; Helen - Sunnyvale CA
- Xu, Helen - Sunnyvake CA
| Patent | Date |
|---|---|
| Midstream Urine Collection App 20210353266 - Varotsis; Dante ; et al. | 2021-11-18 |
| Acid-base proton conducting polymer blend membrane Grant 7,534,515 - Nam , et al. May 19, 2 | 2009-05-19 |
| Ion conductive random copolymers Grant 7,354,679 - Cao , et al. April 8, 2 | 2008-04-08 |
| Sulfonated copolymer Grant 7,202,001 - Cao , et al. April 10, 2 | 2007-04-10 |
| Ion conductive block copolymers Grant 7,094,490 - Cao , et al. August 22, 2 | 2006-08-22 |
| Ion conductive block copolymers App 20060135657 - Cao; Shuguang ; et al. | 2006-06-22 |
| Ion conductive random copolymers App 20050181256 - Cao, Shuguang ; et al. | 2005-08-18 |
| Ion conductive block copolymers App 20040126666 - Cao, Shuguang ; et al. | 2004-07-01 |
| Sulfonated copolymer App 20040039148 - Cao, Shuguang ; et al. | 2004-02-26 |
| Acid-base proton conducting polymer blend membrane App 20030219640 - Nam, Kiehyun ; et al. | 2003-11-27 |
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