Method of manufacture for cathode-ray tubes for color television receivers
Abstract
Abstract -A method of manufacture for cathode-ray tubes for -color television receivers of the type in which a grid consisting -of parallel metal wires is disposed in the tube facing the -front wall on which the television image is formed. The wires -of the grid are of a non-magnetic alloy with a high cobalt content, -as a rule more than 20 percent by weight, the composition further being such that in the course of heat treatment for joining the front portion of the tube with the conical portion by means of -a sealing compound, oxides favorable to the airtight connection between the alloy and the sealing compound appear at the surface -of the wires which renders unnecessary a second step of heat treatment for forming a sealing fillet at the outer ends of the wires.
Inventors
- 👤 P Lebel
Bibliographic Details
Claims Analysis
Total Claims: 3References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |