US2815462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a film supported a short distance from a surface and cathode-ray tube incorporating such film
Assignee: Electronique SA Soc Gen
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Filing: 1954-05-14
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Granted: 1957-12-03
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Expires: 1974-05-14
Abstract
No abstract record available.
Inventors
- 👤 Auphan Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:48
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/14; H01B; H01B1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |