John Irven
20Patents
10h-index
26Co-inventors
75Inventor score
Filing activity: Sep 3, 1975 → Jan 27, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5409526A | Apparatus for supplying high purity fluid | Mechanical Engineering; Lighting; Heating | 79 | Expired |
| US6314986A | Gas control device and method of supplying gas | Emerging Cross-Sectional Technologies | 35 | Expired |
| US4009014A | Optical fiber manufacture | Chemistry; Metallurgy | 26 | Expired |
| US4165224A | Method of manufacturing optical fibre preforms | Chemistry; Metallurgy | 21 | Expired |
| US4195980A | Method of manufacturing a continuous optical preform | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4335934A | Single mode fibre and method of making | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6648021B2 | Gas control device and method of supplying gas | Emerging Cross-Sectional Technologies | 16 | Expired |
| US7013916B1 | Sub-atmospheric gas delivery method and apparatus | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4087266A | Optical fibre manufacture | Chemistry; Metallurgy | 11 | Expired |
| US4341441A | Method of making solid preforms and optical fibers drawn therefrom | Chemistry; Metallurgy | 10 | Expired |
| US4155733A | Optical fibre manufacture | Chemistry; Metallurgy | 10 | Expired |
| US4242118A | Optical fiber manufacture | Chemistry; Metallurgy | 9 | Expired |
| US6527009B2 | Gas control device and method of supplying gas | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4116653A | Optical fiber manufacture | Chemistry; Metallurgy | 7 | Expired |
| US6085548A | Control vent system for ultra-high purity delivery system for liquefied compressed gases | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6572688B2 | Gas purification unit | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4518407A | Optical fibre preform manufacture | Emerging Cross-Sectional Technologies | 7 | Expired |
| US8129577B2 | Process and system for providing acetylene | Chemistry; Metallurgy | 1 | Active |
| US8915992B2 | Process and system for providing acetylene | Chemistry; Metallurgy | 0 | Active |
| US6571835B2 | Valve assembly, apparatus and method of filing a pressurized gas container | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.