US3682666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Batch material for vitreous manufactures
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1971-01-21
•
Granted: 1972-08-08
•
Expires: 1991-01-21
Abstract
Abstract A NOVEL METHOD FOR MANUFACTURING A PREACTED GLASS MATERIAL IS DISCLOSED. A FREE FLOWING, GRANULAR PRE-PRODUCT CONSISTING IN DISCRETE GRAINS OF SILICA COATED WITH COMPLEX ALKALI METAL-ALKALINE EARTH METAL SILICATES IN A SUBSTANTIALLY CRYSTALLIZED STATE IS OBTAINED BY HEATING PART OF THE BATCH INGREDIENTS ESSENTIAL TO THE CONSTITUETION OF THE GLASS WITH A FEW PERCENT OF CERTAIN HALIDES AT A TEMPERATURE LOWER THAN 787*C.
Inventors
- 👤 Michel Lacourrege
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:01
CPC Classifications
C; C03; C03B; C03B1/00; C03B1/02; C03C; C03C1/00; C03C1/02; C03C1/026
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |