Chromatographic element and method for producing the same
Abstract
Abstract A chromatographic element composed of a thin rod of refractory and chemically-stable materials covered with a porous sintered layer of finely divided or powdered glass containing fine particles of a chromatographically-active inorganic adsorbent within the porous structure of powdered glass is made by coating said thin rod with a slurry including said powdered glass and absorbent and baking said coated thin rod at a temperature at which the glass begins to melt until the glass becomes sticky and the particles thereof adhere to one another and to the thin rod support. The element has an excellent chromatographic activity even after repeated adsorptions, intense heatings by means of, for instance a hydrogen flame and regenerations by means of, for example, corrosive reagents. It can be handled easily in the same manner as conventional glass implements.
Inventors
- 👤 T Okumura
- 👤 T Kadono
Bibliographic Details
Claims Analysis
Total Claims: 5References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |