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Patent US2808446A successfully refreshed from Google Patents.
US2808446A
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Method of and tank furnace for making glass
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1953-09-16
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Granted: 1957-10-01
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Expires: 1973-09-16
Abstract
No abstract record available.
Inventors
- 👤 Lambert Roger Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:36
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/173; C03B5/225
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) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |