US3222206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing reinforced cathode-ray tube for television display
Assignee: US Philips Corp
•
Filing: 1962-02-02
•
Granted: 1965-12-07
•
Expires: 1982-02-02
Abstract
No abstract record available.
Inventors
- 👤 Cornelissen Johannes
- 👤 Kruithof Anton Maarten
- 👤 Meyer Hendrik Willem Hubertus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:46
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/87; H01J9/00; H01J9/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A METHOD OF STRENGTHENING A CATHODE-RAY TUBE HAVING A TRANSPARENT WINDOW AND A GLASS WALL ADJOINING SAID WINDOW AGAINST BRUISING DUE TO IMPACT AND SHOCK FORCES COMPRISING THE STEPS, HEATING THE CATHODE-RAY TUBE TO A TEMPERATURE OF ABOUT 300*C., COVERING A PORTION OF THE SURFACE OF THE HEATED GLASS WALL WITH A POROUS LAYER OF GLAZE HAVING A COEFFICIENT OF EXPANSION BETWEEN ABOUT 30*C. AND 300*C. WHICH IS LOWER THAN THAT OF THE GLASS TO THEREBY PLACE THE LAYER UNDER COMPRESSION WHEN IT COOLS, AND SPRAYING OVER THE FIRST LAYER A SECOND LAYER OF A LIQUID GLAZE HAVING A COEFFICIENT OF EXPANSION LOWER THAN THAT OF THE GLASS TO FORM A POROUS, ROUGH GLAZE LAYER COVERING SAID FIRST GLAZE LAYER.
Claim 2
Independent Claim
120 words
A METHOD OF STRENGTHENING A CATHODE-RAY TUBE HAVING A TRANSPARENT WINDOW AND A GLASS WALL ADJOINING SAID WINDOW AGAINST BRUISING DUE TO IMPACT AND SHOCK FORCES COMPRISING THE STEPS, HEATING THE CATHODE-RAY TUBE TO A TEMPERATURE OF ABOUT 300*C., COVERING A PORTION OF THE SURFACE OF THE HEATED GLASS WALL WITH A POROUS LAYER OF GLAZE HAVING A COEFFICIENT OF EXPANSION BETWEEN ABOUT 30*C. AND 300*C. WHICH IS LOWER THAN THAT OF THE GLASS TO THEREBY PLACE THE LAYER UNDER COMPRESSION WHEN IT COOLS, AND SPRAYING OVER THE FIRST LAYER A SECOND LAYER OF A LIQUID GLAZE HAVING A COEFFICIENT OF EXPANSION LOWER THAN THAT OF THE GLASS TO FORM A POROUS, ROUGH GLAZE LAYER COVERING SAID FIRST GLAZE LAYER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |