US2734857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
snyder
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:17
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE PROCESS OF FORMING AN INSULATING COATING ON A CATHODE-HEATER ELEMENT FOR AN ELECTRON-DISCHARGE DEVICE WHICH COMPRISES THE STEPS OF: CATAPHORETICALLY DEPOSITING ON SAID HEATER ELEMENT AN ELECTRICALLY INSULATING REFRACTORY OXIDE COATING; DIPPING SAID COATED HEATER ELEMENT IN AN ALCOHOL SOLUTION OF AN ORGANIC SILICATE; AND SUBSEQUENTLY FIRING SAID COATED HEATER ELEMENT IN A NONOXIDIZING ATMOSPHERE AT A TEMPERATURE ABOVE THE FUSING POINT OF SILICA AND BELOW BOTH THE BOILING POINT OF SILICA AND THE BOILING POINT OF SAID REFRACTORY OXIDE.
Claim 2
Dependent Claim
81 words
THE PROCESS OF FORMING AN INSULATING COATING ON A CATHODE-HEATER ELEMENT FOR AN ELECTRON-DISCHARGE DEVICE WHICH COMPRISES THE STEPS OF: CATAPHORETICALLY DEPOSITING ON SAID HEATER ELEMENT AN ELECTRICALLY INSULATING REFRACTORY OXIDE COATING; DIPPING SAID COATED HEATER ELEMENT IN AN ALCOHOL SOLUTION OF AN ORGANIC SILICATE; AND SUBSEQUENTLY FIRING SAID COATED HEATER ELEMENT IN A NONOXIDIZING ATMOSPHERE AT A TEMPERATURE ABOVE THE FUSING POINT OF SILICA AND BELOW BOTH THE BOILING POINT OF SILICA AND THE BOILING POINT OF SAID REFRACTORY OXIDE.
References Cited (Backward Citations)
US1926407A
Cited
US1874542A
Cited
US2158665A
Cited
US2307018A
Cited
US2348045A
Cited
US2552535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |