Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8915992 | Process and system for providing acetylene | Timothy John Maykut, Suhas Narayan Ketkar, Benjamin James Arthur Inman, Eugene Joseph Karwacki, Jr., Neil Alexander Downie | 2014-12-23 |
| 8129577 | Process and system for providing acetylene | Timothy John Maykut, Suhas Narayan Ketkar, Benjamin James Arthur Inman, Eugene Joseph Karwacki, Jr., Neil Alexander Downie | 2012-03-06 |
| 7013916 | Sub-atmospheric gas delivery method and apparatus | Ronald Martin Pearlstein, John Giles Langan, Dao-Hong Zheng, Benjamin Lee Hertzler | 2006-03-21 |
| 6648021 | Gas control device and method of supplying gas | Dao-Hong Zheng, Mark George | 2003-11-18 |
| 6571835 | Valve assembly, apparatus and method of filing a pressurized gas container | Peter Reading, Andrew Peter Webb, Lieve De Paepe | 2003-06-03 |
| 6572688 | Gas purification unit | Graham Leggett, Jonathan Davey, Dao-Hong Zheng | 2003-06-03 |
| 6527009 | Gas control device and method of supplying gas | Dao-Hong Zheng, Mark George | 2003-03-04 |
| 6314986 | Gas control device and method of supplying gas | Dao-Hong Zheng, Mark George | 2001-11-13 |
| 6085548 | Control vent system for ultra-high purity delivery system for liquefied compressed gases | Naser Mahmud Chowdhury, Dao-Hong Zheng, Sukla Chandra, Kenneth Coull, Reiner Taege | 2000-07-11 |
| 5409526 | Apparatus for supplying high purity fluid | Dao-Hong Zheng, Alan J. F. Paterson, Daniel C. Tregear | 1995-04-25 |
| 4518407 | Optical fibre preform manufacture | Philip W. Black | 1985-05-21 |
| 4341441 | Method of making solid preforms and optical fibers drawn therefrom | Paul E. Lighty, Philip W. Black | 1982-07-27 |
| 4335934 | Single mode fibre and method of making | Philip W. Black | 1982-06-22 |
| 4242118 | Optical fiber manufacture | — | 1980-12-30 |
| 4195980 | Method of manufacturing a continuous optical preform | Henley F. Sterling | 1980-04-01 |