US2919209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered or bonded ceramic refractory body and method of making it
Assignee: Corning Glass Works
•
Filing: 1955-01-04
•
Granted: 1959-12-29
•
Expires: 1975-01-04
Abstract
No abstract record available.
Inventors
- 👤 Albert G Bossard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:22
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5007; C04B41/501; C04B41/80; C04B41/81; C04B41/85; Y; Y10; Y10T; Y10T428/00; Y10T428/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
THE METHOD OF MINIMIZING THE TENDENCY FOR THE FORMATION OF GAS BUBBLES AT THE INTERFACE BETWEEN A MOLTEN SILICATE GLASS AND A PREFORMED, LOW-POROSITY CERAMIC REFRACTORY BODY HAVING SUCH TENDENCY, WHICH COMPRISES INTRODUCING INTO THE SURFACE OF AT LEAST THE GLASS CONTACTING FACE OF THE REFRACTORY BODY A COMPOUND OF AN ALKALI METAL SELECTED FROM THE CLASS CONSISTING OF LITHIUM, SODIUM, AND POTASSIUM IN AN AMOUNT EQUIVALENT TO ABOUT 0.001 TO 0.01 MOL OF THE RESPECTIVE ALKALI METAL OXIDE PER 100 G. OF THE TREATED PORTION OF THE BODY, AND HEATING THE TREATED BODY TO AT LEAST 1400* C.
Claim 2
Independent Claim
99 words
THE METHOD OF MINIMIZING THE TENDENCY FOR THE FORMATION OF GAS BUBBLES AT THE INTERFACE BETWEEN A MOLTEN SILICATE GLASS AND A PREFORMED, LOW-POROSITY CERAMIC REFRACTORY BODY HAVING SUCH TENDENCY, WHICH COMPRISES INTRODUCING INTO THE SURFACE OF AT LEAST THE GLASS CONTACTING FACE OF THE REFRACTORY BODY A COMPOUND OF AN ALKALI METAL SELECTED FROM THE CLASS CONSISTING OF LITHIUM, SODIUM, AND POTASSIUM IN AN AMOUNT EQUIVALENT TO ABOUT 0.001 TO 0.01 MOL OF THE RESPECTIVE ALKALI METAL OXIDE PER 100 G. OF THE TREATED PORTION OF THE BODY, AND HEATING THE TREATED BODY TO AT LEAST 1400* C.
Claim 3
Dependent Claim
97 words
A UNITARY CERAMIC REFRACTORY BODY FOR USE IN CONTACT WITH MOLTEN SILICATE GLASS, WHICH HAS A LOW POROSITY THROUGHOUT AND A UNIFORM COMPOSITION EXCEPT IN THE GLASSCONTACTING SURFACE LAYER WHICH, FOR A THICKNESS OF ABOUT 1/4 INCH, CONTAINS IN ADDITION TO THE CONSTITUENT OF THE REMAINDER OF THE BODY AN ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF LI2O, NA2O, AND K2O AND AMOUNTING TO AN AVERABE OF ABOUT 0.0005 TO 0.005 MOL PER 100 G., THE AMOUNT OF ALKALI METAL OXIDE IN SUCH LAYER SUBSTANTIALLY EXCEEDING THE AMOUNT IN THE INTERIOR PORTION OF THE BODY.
Claim 4
Dependent Claim
97 words
A UNITARY CERAMIC REFRACTORY BODY FOR USE IN CONTACT WITH MOLTEN SILICATE GLASS, WHICH HAS A LOW POROSITY THROUGHOUT AND A UNIFORM COMPOSITION EXCEPT IN THE GLASSCONTACTING SURFACE LAYER WHICH, FOR A THICKNESS OF ABOUT 1/4 INCH, CONTAINS IN ADDITION TO THE CONSTITUENT OF THE REMAINDER OF THE BODY AN ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF LI2O, NA2O, AND K2O AND AMOUNTING TO AN AVERABE OF ABOUT 0.0005 TO 0.005 MOL PER 100 G., THE AMOUNT OF ALKALI METAL OXIDE IN SUCH LAYER SUBSTANTIALLY EXCEEDING THE AMOUNT IN THE INTERIOR PORTION OF THE BODY.
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) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |