US3357766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling cathode formation in tv tube gun
Assignee: National Video Corp
•
Filing: 1966-08-17
•
Granted: 1967-12-12
•
Expires: 1986-08-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert R Conger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:27
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/04; H01J9/00; H01J9/02; H01J9/04; H01J9/042; H01J9/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
IN THE METHOD OF CONTROLLING THE FORMING OF A CATHODE IN A TELEVISION TUBE, THE STEP OF REDUCING THE FILAMENT VOLT WHILE INCREASING THE VOLTAGE OF ONE OF THE PRE-FOCUS GRIDS, THE SAID FILAMENT VOLTAGE PRIOR TO DECREASE BEING OF VALUE SUCH AS TO CAUSE SAID CATHODE TO EMIT WHEN IN UNFORMED CONDITION.
Claim 2
Dependent Claim
53 words
IN THE METHOD OF CONTROLLING THE FORMING OF A CATHODE IN A TELEVISION TUBE, THE STEP OF REDUCING THE FILAMENT VOLT WHILE INCREASING THE VOLTAGE OF ONE OF THE PRE-FOCUS GRIDS, THE SAID FILAMENT VOLTAGE PRIOR TO DECREASE BEING OF VALUE SUCH AS TO CAUSE SAID CATHODE TO EMIT WHEN IN UNFORMED CONDITION.
References Cited (Backward Citations)
US2435475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |