US3342572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making cellular phosphate glass
Assignee: Corning Glass Works
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Filing: 1963-12-30
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Granted: 1967-09-19
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Expires: 1983-12-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas C Macavoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:58
CPC Classifications
C; C03; C03C; C03C11/00; C03C11/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A METHOD FOR MAKING CELLULAR GLASS WHEREIN THE CELL WALLS THEREOF ARE COATED WITH ELEMENTAL PHOSPHORUS WHICH COMPRISES: (A) COMPOUNDING A BATCH FOR A PHOSPHORUS-CONTAINING GLASS HAVING A VISCOSITY OF BETWEEN ABOUT 10**5-10**11 POISES AT TEMPERATURES IN THE RANGE OF 280*-900*C, SELECTED FROM THE GROUP CONSISTING OF ALKALI PHOSPHATE GLASSES, ALKALINE EARTH PHOSPHATE GLASSES, AND ALUMINO-PHOSPHATE GLASSES, WHEREIN P205 CONSTITUTES GREATER THAN 50 MOL PERCENT OF THE NETWORK FORMING CONSTITUENTS, SAID BATCH BEING FREE FROM COMPOUNDS CONTAINING METALS MORE READILY REDUCIBLE THAN PHOSPHORUS; (B) MELTING SAID BATCH WITH A REDUCING AGENT; (C) EXPOSING THE MELT TO A TEMPERATURE IN EXCESS OF 900*C. (D) COOLING SAILD MELT TO A TEMPERATURE AT LEAST BELOW THAT AT WHICH THE GLASS HAS A VISCOSITY OF ABOUT 10**5 POISES; (E) EXPOSING THE GLASS TO A TEMPERATURE BETWEEN ABOUT 280*-900*C. AT WHICH THE VISCOSITY OF THE GLASS IS BETWEEN ABOUT 10**5-10**11 POISES FOR A PERIOD OF TIME SUFFICIENT TO ATTAIN CELLULATION; AND THEN (F) COOLING THE CELLULATED GLASS TO ROOM TEMPERTURE TO COAT ELEMENTAL PHOSPHORUS ON THE CELL WALLS.
Claim 2
Independent Claim
173 words
A METHOD FOR MAKING CELLULAR GLASS WHEREIN THE CELL WALLS THEREOF ARE COATED WITH ELEMENTAL PHOSPHORUS WHICH COMPRISES: (A) COMPOUNDING A BATCH FOR A PHOSPHORUS-CONTAINING GLASS HAVING A VISCOSITY OF BETWEEN ABOUT 10**5-10**11 POISES AT TEMPERATURES IN THE RANGE OF 280*-900*C, SELECTED FROM THE GROUP CONSISTING OF ALKALI PHOSPHATE GLASSES, ALKALINE EARTH PHOSPHATE GLASSES, AND ALUMINO-PHOSPHATE GLASSES, WHEREIN P205 CONSTITUTES GREATER THAN 50 MOL PERCENT OF THE NETWORK FORMING CONSTITUENTS, SAID BATCH BEING FREE FROM COMPOUNDS CONTAINING METALS MORE READILY REDUCIBLE THAN PHOSPHORUS; (B) MELTING SAID BATCH WITH A REDUCING AGENT; (C) EXPOSING THE MELT TO A TEMPERATURE IN EXCESS OF 900*C. (D) COOLING SAILD MELT TO A TEMPERATURE AT LEAST BELOW THAT AT WHICH THE GLASS HAS A VISCOSITY OF ABOUT 10**5 POISES; (E) EXPOSING THE GLASS TO A TEMPERATURE BETWEEN ABOUT 280*-900*C. AT WHICH THE VISCOSITY OF THE GLASS IS BETWEEN ABOUT 10**5-10**11 POISES FOR A PERIOD OF TIME SUFFICIENT TO ATTAIN CELLULATION; AND THEN (F) COOLING THE CELLULATED GLASS TO ROOM TEMPERTURE TO COAT ELEMENTAL PHOSPHORUS ON THE CELL WALLS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |