US2990438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of and tank furnaces for making glass
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1954-12-09
•
Granted: 1961-06-27
•
Expires: 1974-12-09
Abstract
No abstract record available.
Inventors
- 👤 Lambert Roger Emile
- 👤 Arbeit Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:47
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/02; C03B5/027
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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |