Patent US2207538A successfully refreshed from Google Patents.
Patent US3177392A successfully refreshed from Google Patents.
US3177392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grid support structure
Assignee: RCA Corp
•
Filing: 1960-06-27
•
Granted: 1965-04-06
•
Expires: 1980-06-27
Abstract
No abstract record available.
Inventors
- 👤 Jerome J Free
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:55
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J2893/00; H01J2893/0001; H01J2893/0002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
AN ELECTRON DISCHARGE DEVICE COMPRISING A CANTILEVER SUPPORTED CATHODE, CONTROL GRID, AND SCREEN GRID, AND MEANS FOR MECHANICALLY JOINING THE FREE END PORTIONS OF SAID CATHODE, SAID CONTROL GRID AND SAID SCREEN GRID, SAID MEANS COMPRISING AN INSULATING MEMBERS ENGAGING ONLY SAID CATHODE AND SAID CONTROL AND SCREEN GRIDS, SAID GRIDS AND SAID CATHODE HAVING INTURNED ANNULAR FLANGES AT SAID FREE END PORTIONS THEREOF, THE FREE EDGES ONLY OF SAID GRID FLANGES ENGAGING SAID INSULATING MEMBER, AND A RING INCLUDING A TUBULAR PORTION AND AN ANNULAR FLANGE. SIDE SUR-
Claim 2
Dependent Claim
89 words
AN ELECTRON DISCHARGE DEVICE COMPRISING A CANTILEVER SUPPORTED CATHODE, CONTROL GRID, AND SCREEN GRID, AND MEANS FOR MECHANICALLY JOINING THE FREE END PORTIONS OF SAID CATHODE, SAID CONTROL GRID AND SAID SCREEN GRID, SAID MEANS COMPRISING AN INSULATING MEMBERS ENGAGING ONLY SAID CATHODE AND SAID CONTROL AND SCREEN GRIDS, SAID GRIDS AND SAID CATHODE HAVING INTURNED ANNULAR FLANGES AT SAID FREE END PORTIONS THEREOF, THE FREE EDGES ONLY OF SAID GRID FLANGES ENGAGING SAID INSULATING MEMBER, AND A RING INCLUDING A TUBULAR PORTION AND AN ANNULAR FLANGE. SIDE SUR-
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |