US2652842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Envelope treating apparatus, particularly glass envelopes for cathode-ray tubes
Assignee: National Video Corp
•
Filing: 1950-04-07
•
Granted: 1953-09-22
•
Expires: 1970-04-07
Abstract
No abstract record available.
Inventors
- 👤 Melberne L Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:14
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)
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US2240364A
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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) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |