US3392037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory shape
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1965-07-16
•
Granted: 1968-07-09
•
Expires: 1985-07-16
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Nelly
- 👤 Marshall L Mayberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:50
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315; C04B35/00; C04B35/01; C04B35/12; C04B35/42; C04B35/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A REFRACTORY COMPOSITION HAVING HIGH STRENGTH AT ELEVATED TEMPERATURES CONSISTING OF SIZED NONACID METAL OXIDE REFRACTORY GRAIN SELECTED FROM THE GROUP CONSISTING OF MAGNESIA, CHROMITE AND MIXTURES OF MAGNESIA AND CHROMITE WITH EACH OTHER AND, AS BOND, FROM ABOUT 0.5% TO ABOUT 2.0%, BASED ON THE TOTAL WEIGHT OF THE COMPOSITION, OF ALKALI METAL POLYPHOSPHATE, AT LEAST HALF OF SAID ALKALI METAL POLYPHOSPHATE BEING AN ALKALI METAL TRIPOLYPHOPSPHATE, THE BALANCE OF THE ALKALI METAL POLYPHOSPHATE BEING A LONG CHAIN POLYPHOSPHATE.
Claim 2
Dependent Claim
80 words
A REFRACTORY COMPOSITION HAVING HIGH STRENGTH AT ELEVATED TEMPERATURES CONSISTING OF SIZED NONACID METAL OXIDE REFRACTORY GRAIN SELECTED FROM THE GROUP CONSISTING OF MAGNESIA, CHROMITE AND MIXTURES OF MAGNESIA AND CHROMITE WITH EACH OTHER AND, AS BOND, FROM ABOUT 0.5% TO ABOUT 2.0%, BASED ON THE TOTAL WEIGHT OF THE COMPOSITION, OF ALKALI METAL POLYPHOSPHATE, AT LEAST HALF OF SAID ALKALI METAL POLYPHOSPHATE BEING AN ALKALI METAL TRIPOLYPHOPSPHATE, THE BALANCE OF THE ALKALI METAL POLYPHOSPHATE BEING A LONG CHAIN POLYPHOSPHATE.
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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |