Patent US3304187A successfully refreshed from Google Patents.
US3304187A
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Basic refractory compositions
Assignee: Republic Steel Corp
•
Filing: 1965-03-01
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Granted: 1967-02-14
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Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 Robert W Limes
- 👤 Robert O Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:46
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315; C04B35/00; C04B35/01; C04B35/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A REFRACTORY MIXTURE CONSISTING ESSENTIALLY OF (A) GRANULES OF AN AGGREGATE CONTAINING AT LEAST 5 PERCENT BY WEIGHT OF MAGNESIA, (B) 0.5-6 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF AGGREGATE OF A SODIUM POLYPHOSPHATE OF THE FORMHULA
Claim 2
Dependent Claim
39 words
A REFRACTORY MIXTURE CONSISTING ESSENTIALLY OF (A) GRANULES OF AN AGGREGATE CONTAINING AT LEAST 5 PERCENT BY WEIGHT OF MAGNESIA, (B) 0.5-6 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF AGGREGATE OF A SODIUM POLYPHOSPHATE OF THE FORMHULA
References Cited (Backward Citations)
US2479504A
Cited
US3199995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |