US2660978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube coating apparatus
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1951-07-30
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Granted: 1953-12-01
•
Expires: 1971-07-30
Abstract
No abstract record available.
Inventors
- 👤 James H Dyne
- 👤 Cornelius M Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:10
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB155395A
Cited
US2383023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |