US2768088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory linings for furnaces and method of producing
Assignee: Individual
•
Filing: 1953-06-30
•
Granted: 1956-10-23
•
Expires: 1973-06-30
Abstract
No abstract record available.
Inventors
- 👤 Doat Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:23
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
REFRACTORY LINING FOR FURNACES, CONSISTING OF CARBON, SILICA, ALUMINA, FERRIC OXIDE, CALCIUM OXIDE AND MAGNESIA IN THE PROPORTIONS OF 1 MOLECULE OF CARBON TO 1.4-1.7 MOLECULES SILICA, 0.07-0.11 MOLECULE ALUMINA, 0.007-0.025 MOLECULE FERRIC OXIDE, 0.003-0.012 MOLECULE CALCIUM OXIDE AND 0.00010-0.0035 MOLECULE MAGNESIA.
Claim 2
Dependent Claim
42 words
REFRACTORY LINING FOR FURNACES, CONSISTING OF CARBON, SILICA, ALUMINA, FERRIC OXIDE, CALCIUM OXIDE AND MAGNESIA IN THE PROPORTIONS OF 1 MOLECULE OF CARBON TO 1.4-1.7 MOLECULES SILICA, 0.07-0.11 MOLECULE ALUMINA, 0.007-0.025 MOLECULE FERRIC OXIDE, 0.003-0.012 MOLECULE CALCIUM OXIDE AND 0.00010-0.0035 MOLECULE MAGNESIA.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |