US3135616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory x
Assignee: —
•
Filing: —
•
Granted: 1964-06-02
•
Expires: 1981-06-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:55
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/14; C03; C03B; C03B5/00; C03B5/16; C03B5/42; C03B5/43; C04B35/10; C04B35/101; C04B35/622; C04B35/626; C04B35/62605; C04B35/62645; C04B35/62665; C04B35/66; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3217; C04B2235/34; C04B2235/3418; C04B2235/70; C04B2235/72; C04B2235/74; C04B2235/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A FIRED REFRACTORY ARTICLE FOR CONTACT WITH MOLTEN GLASS HAVING HIGH THERMAL SHOCK AND CORROSION RESISTANCE PROPERTIES AND FORMED BY FIRING A REFRACTORY COMPOSITION CONSISTING OF 10-50% BY WEIGHT OF AN ALUMINA-SILICA GRAIN IN GRADED SIZES TO PRODUCE LOW POROSITY HAVING AN ALUMINA CONTENT IN THE RANGE OF 80-95% BY WEIGHT, 4-12% BY WEIGHT OF BONDING CLAY, AND THE REMAINDER CORUNDUM GRAIN IN GRADED SIZES TO PRODUCE LOW POROSITY.
Claim 2
Dependent Claim
69 words
A FIRED REFRACTORY ARTICLE FOR CONTACT WITH MOLTEN GLASS HAVING HIGH THERMAL SHOCK AND CORROSION RESISTANCE PROPERTIES AND FORMED BY FIRING A REFRACTORY COMPOSITION CONSISTING OF 10-50% BY WEIGHT OF AN ALUMINA-SILICA GRAIN IN GRADED SIZES TO PRODUCE LOW POROSITY HAVING AN ALUMINA CONTENT IN THE RANGE OF 80-95% BY WEIGHT, 4-12% BY WEIGHT OF BONDING CLAY, AND THE REMAINDER CORUNDUM GRAIN IN GRADED SIZES TO PRODUCE LOW POROSITY.
References Cited (Backward Citations)
US2895840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |