US2686820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass furnace and process for melting glass
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1951-07-03
•
Granted: 1954-08-17
•
Expires: 1971-07-03
Abstract
No abstract record available.
Inventors
- 👤 Arbeit Pierre
- 👤 Thebault Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:18
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/225; C03B5/18; C03B5/182
Claims Analysis
Total Claims: 0
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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) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |