US2955948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass decolorizing method
Assignee: OI Glass Inc
•
Filing: 1958-05-08
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Granted: 1960-10-11
•
Expires: 1978-05-08
Abstract
No abstract record available.
Inventors
- 👤 William B Silverman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:47
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/02; C03C14/00; C03C14/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN A METHOD OF MAKING COLORLESS GLASS INCLUDING THE MELTING OF A FLINT GLASS BATCH AND THE FLOWING OF A MOLTEN GLASS STREAM THROUGH A FOREHEARTH, THE IMPROVEMENT OF ADDING TO THE FOREHEARTH STREAM A DECOLORIZING SODA-LIME FLINT GLASS FRIT HAVING A SELENIUM CONTENT OF AT LEAST 0.07%, THE SELENIUM BEING PERSENT PREDOMINANTLY IN ITS SE+4 VALENCE STATE, THE FRIT ADDITION BEING MADE AT A RATE TO YIELD AT LEAST 0.08 OUNCE OF SELENIUM PER TON OF SAND IN THE COMPOSITE GLASS STREAM.
Claim 2
Dependent Claim
83 words
IN A METHOD OF MAKING COLORLESS GLASS INCLUDING THE MELTING OF A FLINT GLASS BATCH AND THE FLOWING OF A MOLTEN GLASS STREAM THROUGH A FOREHEARTH, THE IMPROVEMENT OF ADDING TO THE FOREHEARTH STREAM A DECOLORIZING SODA-LIME FLINT GLASS FRIT HAVING A SELENIUM CONTENT OF AT LEAST 0.07%, THE SELENIUM BEING PERSENT PREDOMINANTLY IN ITS SE+4 VALENCE STATE, THE FRIT ADDITION BEING MADE AT A RATE TO YIELD AT LEAST 0.08 OUNCE OF SELENIUM PER TON OF SAND IN THE COMPOSITE GLASS STREAM.
References Cited (Backward Citations)
US2229416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |