US2961328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory glass composition
Assignee: OI Glass Inc
•
Filing: 1958-12-02
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Granted: 1960-11-22
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Expires: 1978-12-02
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Babcock
- 👤 Mcdavitt Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:47
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/102; C03C3/083; C03C3/085; C03C3/087; C03C3/089; C03C3/091; C03C3/093; C03C3/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A REFRACTORY GLASS COMPOSITION FOR HIGH TEMPERATURE APPLICATION WHICH IS RESISTANT TO DAMAGE BY EXPOSURE TO HIGH ENERGY PARTICLES CONSISTING ESSENTIALLY OF ABOUT 54 TO 65% SILICON DIOXIDE, ABOUT 15 TO 22% ALUMINUM OXIDE, ABOUT 7 TO 30% CALCIUM AND MAGNESIUM OXIDES IN ESSENTIALLY THE DOLOMITIC LIMESTONE RETIO, AND A SIGNIFICANT AMOUNT OF A CONSTITUENT SELECTED FROM THE FOLLOWING: ABOUT UP TO 10% BARIUM OXIDE, ABOUT UP 10% LEAD OXIDE, ABOUT UP TO 3% OXIDE, ABOUT UP TO 3% ZINC OXIDE, ABOUT UP 3% TITANIUM DIOXIDE, ABOUT UP TO 3% SODIUM OXIDE AND ABOUT UP TO 3% POTASSIUM OXIDE, THE SAID GLASS COMPOSITION HAVING A COEFFICIENT OF THERMAL EXPANSION (0*300*C.), RANGING FROM ABOUT 26 TO 60X10-7 CM. PER CM. PER *C., A LIQUIDUS TEMPERATURE RANGING FROM ABOUT 1200* TO 1460*C. AND A SOFTENING POINT TEMPERATURE NOT LESS THAT 950*C.
Claim 2
Dependent Claim
139 words
A REFRACTORY GLASS COMPOSITION FOR HIGH TEMPERATURE APPLICATION WHICH IS RESISTANT TO DAMAGE BY EXPOSURE TO HIGH ENERGY PARTICLES CONSISTING ESSENTIALLY OF ABOUT 54 TO 65% SILICON DIOXIDE, ABOUT 15 TO 22% ALUMINUM OXIDE, ABOUT 7 TO 30% CALCIUM AND MAGNESIUM OXIDES IN ESSENTIALLY THE DOLOMITIC LIMESTONE RETIO, AND A SIGNIFICANT AMOUNT OF A CONSTITUENT SELECTED FROM THE FOLLOWING: ABOUT UP TO 10% BARIUM OXIDE, ABOUT UP 10% LEAD OXIDE, ABOUT UP TO 3% OXIDE, ABOUT UP TO 3% ZINC OXIDE, ABOUT UP 3% TITANIUM DIOXIDE, ABOUT UP TO 3% SODIUM OXIDE AND ABOUT UP TO 3% POTASSIUM OXIDE, THE SAID GLASS COMPOSITION HAVING A COEFFICIENT OF THERMAL EXPANSION (0*300*C.), RANGING FROM ABOUT 26 TO 60X10-7 CM. PER CM. PER *C., A LIQUIDUS TEMPERATURE RANGING FROM ABOUT 1200* TO 1460*C. AND A SOFTENING POINT TEMPERATURE NOT LESS THAT 950*C.
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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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |