Patent US3582307A successfully refreshed from Google Patents.
US3582307A
Expired / Lapsed
US
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Methd of removing water from melts of inorganic glass
Assignee: MAX PLANCK INST fur SILIKATFOR
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Filing: 1970-01-19
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Granted: 1971-06-01
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Expires: 1990-01-19
Abstract
Abstract WATER IS REMOVED FROM A MELT OF INORGANIC GLASS BY INTRODUCING INTO THE GLASS MELT MOLECULAR NITROGEN WITH A NITROGEN-FREE REDUCING AGENT, SUCH AS CARBON OR CARBON MONOXIDE WHICH WITH THE GLASS-FORMING ELEMENTS CARRYING OXYGEN AND HYDROXYL GROUPS FROM VOLATILE COMPOUNDS OTHER THAN WATER, AND A NITROGEN-CONTAINING AGENT SUCH AS NITRIDES OR ATOMIC NITROGEN. THEREBY THE OXIDE ATOMS AND HYDROXYL GROUPS BOUND TO THE GLASS-FORMING ELEMENTS ARE REPLACED BY NITROGEN ATOMS. THE REDUCING AGENTS MAY BE ADDED TO THE GLASS BATCH PRIOR TO OR DURING THE MELTING PROCESS.
Inventors
- 👤 Hans-Otto Mulfinger
- 👤 Helmut Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:17
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/10; C03B19/1005; C03B19/102; C03B5/00; C03B5/16; C03B5/225; C03B5/235; C03C; C03C1/00; Y; Y02; Y02P; Y02P40/00; Y02P40/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |