Patent US2641727A successfully refreshed from Google Patents.
US2641727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode insulator
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1950-05-24
•
Granted: 1953-06-09
•
Expires: 1970-05-24
Abstract
No abstract record available.
Inventors
- 👤 Pohle Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:01
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/48; H01J29/485; H01J19/00; H01J19/42; H01J19/44
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2087327A
Cited
US2185807A
Cited
US2414500A
Cited
US2440889A
Cited
US2507812A
Cited
US2442378A
Cited
US2507979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |