US2534328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitrifying refractory composition and product
Assignee: KATHERINE L WHITMAN
•
Filing: 1946-09-06
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Granted: 1950-12-19
•
Expires: 1966-09-06
Abstract
No abstract record available.
Inventors
- 👤 Henry L Whitman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:28
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; C03C8/06; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249956; Y10T428/249957; Y10T428/249967; Y10T428/249969
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
A VITRIFYING COMPOSITION ADAPTED TO PRODUCE A REFRACTORY, VITRIFIED CRYSTALLINE SPINEL TYPE PRODUCT, COMPRISING BY WEIGHT THE FOLLOWING INGREDIENTS: MAGNESIUM OXIDE 20% TO 25%; ZIRCONIUM SILICATE 25% TO 30%; ALUMINUM OXIDE 5% TO 15%; CLAY 8% TO 15%; ASBESTOS 5% TO 15%; LITHARGE 3% TO 10%; A CARBONATE 2% TO 8%, SELECTED FROM THE GROUP CONSISTING OF SODIUM CARBONATE AND POTASSIUM CARBONATE; ACHLORIDE 3% TO 8%, SELECTED FROM THE GROUP CONSISTING OF SODIUM CHLORIDE AND POTASSIUM CHLORIDE; MICA 2% TO 8%; AND A SILICATE 1% TO 5% SELECTED FROM THE GROUP CONSISTING OF SODIUM SILICATE AND POTASSIUM SILICATE.
References Cited (Backward Citations)
US2389386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |