US2945768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreous refractory composition and method for making same
Assignee: Minerals & Chemicals Corp Of A
•
Filing: 1958-09-25
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Granted: 1960-07-19
•
Expires: 1978-09-25
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Grim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:31
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/06; C03C1/00; C03C1/002; C03C3/076; C03C3/097; C03C2201/00; C03C2201/06; C03C2201/20; C03C2201/28; C03C2203/00; C03C2203/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE METHOD OF MAKING A VITREOUS REFRACTORY COMPOSITION WHICH COMPRISES MIXING THE SILICA RESIDUE PRODUCED BY REMOVAL OF CATIONS OTHER THAN SILICA FROM A MINERAL STRUCTURE IN WHICH THERE IS A CONTINUOUS SILICA SKELETON, PHOSPHORIC ACID IN AN AMOUNT SUCH THAT THE P2O5 CONTENT OF THE MIXTURE, ON A VOLATILE-FREE BASIS, IS WITHIN THE RANGE OF ABOUT 0.25% TO ABOUT 15%, AND FIRING SAID MIXTURE AT A TEMPERATURE SUFFICIENT TO MELT SAID MIXTURE AND COOLING THE MOLTEN MIXTURE.
Claim 2
Independent Claim
78 words
THE METHOD OF MAKING A VITREOUS REFRACTORY COMPOSITION WHICH COMPRISES MIXING THE SILICA RESIDUE PRODUCED BY REMOVAL OF CATIONS OTHER THAN SILICA FROM A MINERAL STRUCTURE IN WHICH THERE IS A CONTINUOUS SILICA SKELETON, PHOSPHORIC ACID IN AN AMOUNT SUCH THAT THE P2O5 CONTENT OF THE MIXTURE, ON A VOLATILE-FREE BASIS, IS WITHIN THE RANGE OF ABOUT 0.25% TO ABOUT 15%, AND FIRING SAID MIXTURE AT A TEMPERATURE SUFFICIENT TO MELT SAID MIXTURE AND COOLING THE MOLTEN MIXTURE.
References Cited (Backward Citations)
GB674247A
Cited
US2802749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |