US2955049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a cellular glass product
Assignee: Armstrong World Industries Inc
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Filing: 1959-02-25
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Granted: 1960-10-04
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Expires: 1979-02-25
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:42
CPC Classifications
C; C03; C03C; C03C11/00; C03C11/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN A METHOD OF MAKING A CELLULAR GLASS PRODUCT, THE STEPS COMPRISING MIXING TOGETHER TO FORM A BATCH, FINELY DIVIDED GLASS SELECTED FROM THE GROUP CONSISTING OF FUSED SODA-LIME GLASS, FUSED BOROSILICATE GLASS, AND MIXTURES THEREOF, AND AS A FLUXING AND GASING AGENT A MIXTURE OF SODIUM NITRATE AND SODIUM HYDROXIDE IN THE PROPORTION OF ABOUT A 2% TO ABOUT A 20% ADDITION OF SAID FLUXING AND GASING AGENT TO SAID GLASS, BASED ON THE NA2O YEILD OF THE FLUXING AND GASING AGENT, SAID SODIUM NITRATE BEING PRESENT IN SAID MIXTURE TO THE EXTENT OF BETWEEN ABOUT 2 MOL PERCENT AND 98 MOL PERCENT, FIRING SAID BATCH WITHIN A TEMPERATURE RANGE OF ABOUT 1300*F. TO ABOUT 2000* F. TO FORM A SOFTENED MASS AND TO LIBERATE GAS INTO THE SOFTENED MASS TO FORM CELLS THEREIN, CONTINUING THE FIRING UNTIL THE GAS RELEASED INTO SAID SOFTENED MASS PRODUCES A FOAMED AND SUBSTANTIALLY EXPANDED CELLULAR PRODUCT, AND THEN ANNEALING THE PRODUCT.
Claim 2
Dependent Claim
159 words
IN A METHOD OF MAKING A CELLULAR GLASS PRODUCT, THE STEPS COMPRISING MIXING TOGETHER TO FORM A BATCH, FINELY DIVIDED GLASS SELECTED FROM THE GROUP CONSISTING OF FUSED SODA-LIME GLASS, FUSED BOROSILICATE GLASS, AND MIXTURES THEREOF, AND AS A FLUXING AND GASING AGENT A MIXTURE OF SODIUM NITRATE AND SODIUM HYDROXIDE IN THE PROPORTION OF ABOUT A 2% TO ABOUT A 20% ADDITION OF SAID FLUXING AND GASING AGENT TO SAID GLASS, BASED ON THE NA2O YEILD OF THE FLUXING AND GASING AGENT, SAID SODIUM NITRATE BEING PRESENT IN SAID MIXTURE TO THE EXTENT OF BETWEEN ABOUT 2 MOL PERCENT AND 98 MOL PERCENT, FIRING SAID BATCH WITHIN A TEMPERATURE RANGE OF ABOUT 1300*F. TO ABOUT 2000* F. TO FORM A SOFTENED MASS AND TO LIBERATE GAS INTO THE SOFTENED MASS TO FORM CELLS THEREIN, CONTINUING THE FIRING UNTIL THE GAS RELEASED INTO SAID SOFTENED MASS PRODUCES A FOAMED AND SUBSTANTIALLY EXPANDED CELLULAR PRODUCT, AND THEN ANNEALING THE PRODUCT.
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) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |