Patent US3228548A successfully refreshed from Google Patents.
US3228548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strengthened cathode ray tube
Assignee: Corning Glass Works
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Filing: 1962-01-10
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Granted: 1966-01-11
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Expires: 1982-01-10
Abstract
No abstract record available.
Inventors
- 👤 Miles F Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:48
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/87
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN A CATHODE RAY TUBE COMPRISING A FUNNEL AND A SUBSTANTIALLY RECTANGULAR FACE PLATE SEALED THERETO, THE IMPROVEMENT WHICH COMPRISES A COATING ON THE OUTER SURFACE OF SAID TUBE, SAID COATING COMPRISING A DEVITRIFIED GLASS HAVING INTERMINGLED THEREWITH A QUANTITY OF FINELY DIVIDED REFRACTORY MATERIAL, SAID COATING BEING APPLIED IN FOUR AREAS, SAID AREAS BEING LOCATED SUBSTANTIALLY ALONG THE INTERSECTION BETWEEN SAID FUNNEL AND SAID FACE PLATE AND IN POSITIONS CORRESPONDING GENERALLY TO THE CENTERS OF THE SIDES OF SAID RECTANGULAR FACE PLATE.
Claim 2
Dependent Claim
83 words
IN A CATHODE RAY TUBE COMPRISING A FUNNEL AND A SUBSTANTIALLY RECTANGULAR FACE PLATE SEALED THERETO, THE IMPROVEMENT WHICH COMPRISES A COATING ON THE OUTER SURFACE OF SAID TUBE, SAID COATING COMPRISING A DEVITRIFIED GLASS HAVING INTERMINGLED THEREWITH A QUANTITY OF FINELY DIVIDED REFRACTORY MATERIAL, SAID COATING BEING APPLIED IN FOUR AREAS, SAID AREAS BEING LOCATED SUBSTANTIALLY ALONG THE INTERSECTION BETWEEN SAID FUNNEL AND SAID FACE PLATE AND IN POSITIONS CORRESPONDING GENERALLY TO THE CENTERS OF THE SIDES OF SAID RECTANGULAR FACE PLATE.
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |