US3556753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for melting and processing heat-softenable mineral materials
Assignee: Individual
•
Filing: 1968-09-12
•
Granted: 1971-01-19
•
Expires: 1988-09-12
Abstract
Abstract THE DISCLOSURE EMBRACES A METHOD OF THERMALLY CONDITIONING AND PROCESSING HEAT-SOFTENED G LASS IN A STREAM FEEDER CHAMBER BY TRAVERSING THE GLASS IN BOTH DOWNWARDLY AND UPWARDLY DIRECTED PATHS AND HEATING THE GLASS TO PROMOTE THE EFFLUENCE OF GAS BUBBLES TO EFFECT IMPROVED REFINEMENT OF THE GLASS.
Inventors
- 👤 Hellmut I Glaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:28
CPC Classifications
F; F27; F27D; F27D27/00; C; C03; C03B; C03B37/00; C03B37/08; C03B37/081
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |