US3248234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass compositions
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1961-12-18
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Granted: 1966-04-26
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Expires: 1981-12-18
Abstract
No abstract record available.
Inventors
- 👤 Godron Yves Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:36
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/17; C05; C05D; C05D9/00; C05D9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
NON-TOXIC GLASS HAVING AS ITS THREE ESSENTIAL INGREDIENTS ALKALI METAL OXIDE, P2O5, AND AL2O3, IN THE PROPORTION OF 25 TO 58% OF ALKALI METAL OXIDE, 29 TO 68% OF P2O5 AND 2 TO 20% OF AL2O3, THE P2O5 BEING FROM 40 TO 68% WHEN ALKALI METAL OXIDE IS FROM 25 TO 50% AND FROM 29 TO 48% WHEN ALKALI METAL OXIDE IS HIGHER THAN 50%, AND THE AL2O3 BEING FROM 2 TO 10% WHEN ALKALI METAL OXIDE IS FROM 25 TO 50% AND FROM 2 TO 20% WHEN ALKALI METAL OXIDE IS HIGHER THAN 50%, THE PERCENTAGES BEING EXPRESSED AS MOLE PERCENTS OF THE TOTAL OF THE THREE INGREDIENTS, THE RATIO BETWEEN THE MOLES OF P2O5 AND AL2O3 BEING NOT LESS THAN 1.5 TO 1 AND THE CONTENT OF AL2O3 BEING LESS THAN 20% BY WEIGHT OF THE GLASS THE TOTAL IMPURITIES BEING LESS THAN 4% OF THE WEIGHT OF THE GLASS.
Claim 2
Dependent Claim
152 words
NON-TOXIC GLASS HAVING AS ITS THREE ESSENTIAL INGREDIENTS ALKALI METAL OXIDE, P2O5, AND AL2O3, IN THE PROPORTION OF 25 TO 58% OF ALKALI METAL OXIDE, 29 TO 68% OF P2O5 AND 2 TO 20% OF AL2O3, THE P2O5 BEING FROM 40 TO 68% WHEN ALKALI METAL OXIDE IS FROM 25 TO 50% AND FROM 29 TO 48% WHEN ALKALI METAL OXIDE IS HIGHER THAN 50%, AND THE AL2O3 BEING FROM 2 TO 10% WHEN ALKALI METAL OXIDE IS FROM 25 TO 50% AND FROM 2 TO 20% WHEN ALKALI METAL OXIDE IS HIGHER THAN 50%, THE PERCENTAGES BEING EXPRESSED AS MOLE PERCENTS OF THE TOTAL OF THE THREE INGREDIENTS, THE RATIO BETWEEN THE MOLES OF P2O5 AND AL2O3 BEING NOT LESS THAN 1.5 TO 1 AND THE CONTENT OF AL2O3 BEING LESS THAN 20% BY WEIGHT OF THE GLASS THE TOTAL IMPURITIES BEING LESS THAN 4% OF THE WEIGHT OF THE GLASS.
References Cited (Backward Citations)
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US2227082A
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US2737293A
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US2827393A
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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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |