Patent EP0072167A1 successfully refreshed from Google Patents.
US2469867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glasses having a low coefficient of expansion
Assignee: Societe Francaise Radio Electrique
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Filing: 1947-01-04
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Granted: 1949-05-10
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Expires: 1967-01-04
Abstract
No abstract record available.
Inventors
- 👤 Danzin Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:09
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/02; C03C3/00; C03C3/04; C03C3/076; C03C3/102; C03C3/108
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2297453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |