US2992930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low density refractory oxide
Assignee: Martin Co
•
Filing: 1959-06-23
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Granted: 1961-07-18
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Expires: 1979-06-23
Abstract
No abstract record available.
Inventors
- 👤 William H Wheeler
- 👤 Joseph P Olivito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:21
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; C04B28/342; C04B38/00; C04B38/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
A COMPOSITION FOR THE MANUFACTURE OF FOAMED REFRACTORY OXIDES CONSISTING BY WEIGHT OF 100 PARTS OF A PARTICULATE REFRACTORY OXIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM OXIDE AND ZIRCONIUM OXIDE, 6 TO 15 PARTS OF PARTICULATE CALCIUM SILICATE AS A FOAM STABILIZER, 0.1 TO 0.7 PART OF A PARTICULATE BLOWING AGENT, 8 TO 22 PARTS OF ORTHOPHOSPHORIC ACID, IN AQUEOUS SILICA SOL IN AN AMOUNT SUFFICIENT TO BOND SAID REFRACTORY OXIDE AND THE CALCIUM SILICATE INTO A COHERENT MASS, 2 TO 8 PARTS OF A SOLID ALKALI METAL SILICATE, SAID ALKALI METAL SILICATE HAVING AN ALKALI METAL OXIDE TO SILIC MOLE RATIO IN HE RANGE FROM 1:1 TO 1:4.2 AND SUFFICIENT WATER TO MAKE A WORKABLE SLURRY.
References Cited (Backward Citations)
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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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |