US3752684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating refractory and a method for manufacturing same
Assignee: Societe Europeenne des Produits Refractaires SAS
•
Filing: 1971-06-14
•
Granted: 1973-08-14
•
Expires: 1991-06-14
Abstract
Abstract A SEMIRIGID INSULATING PRODUCE AND METHOD OF MAKING SAME HAVING A USE-LIMIT TEMPERATURE OF AT LEAST 1200*C. AND A DENSITY LESS TAN 0.9 GM./CC. THE PRODUCT IS MADE FROM A BATCH COMPRISING, BY WEIGHT: NEUTRAL MAGNESIUM PHOSPHATE-12 TO 25% ALKALINE-EARTH OXIDES IN EXCESS-UP TO 5% SILICA-50 TO 80% OTHER ACID OXIDES-UP TO 20%, AND MINERAL FIBER-2 TO 20%.
Inventors
- 👤 J Kiehl
- 👤 V Jost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:40
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; C04B35/00; C04B35/01; C04B35/14; C04B2111/00; C04B2111/20; C04B2111/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |