US2616057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Black screen television cathode-ray tube
Assignee: Westinghouse Electric Corp
•
Filing: 1950-05-20
•
Granted: 1952-10-28
•
Expires: 1970-05-20
Abstract
No abstract record available.
Inventors
- 👤 John W Coltman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:48
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/185; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN COMBINATION: A CATHODE RAY TUBE HAVING A TUBE FACE AND ELECTRODES FOR PRODUCING AN ELECTRON BEAM; A FLUORESCENT LAYER PRECIPITATED ON THE INTERNAL SIDE OF SAID TUBE FACE TO FORM A TRANSPARENT GLASSY LAYER THEREON; AND A COATING OF LIGHT ABSORBENT MATERIAL, OF SUCH THICKNESS THAT THE OPERATION OF SAID ELECTRON BEAM IS NOT IMPAIRED, ADJACENT SAID FLUORESCENT LAYER ON THE OPPOSITE SIDE OF SAID FLUORESCENT LAYER FROM SAID TUBE FACE.
Claim 2
Dependent Claim
72 words
IN COMBINATION: A CATHODE RAY TUBE HAVING A TUBE FACE AND ELECTRODES FOR PRODUCING AN ELECTRON BEAM; A FLUORESCENT LAYER PRECIPITATED ON THE INTERNAL SIDE OF SAID TUBE FACE TO FORM A TRANSPARENT GLASSY LAYER THEREON; AND A COATING OF LIGHT ABSORBENT MATERIAL, OF SUCH THICKNESS THAT THE OPERATION OF SAID ELECTRON BEAM IS NOT IMPAIRED, ADJACENT SAID FLUORESCENT LAYER ON THE OPPOSITE SIDE OF SAID FLUORESCENT LAYER FROM SAID TUBE FACE.
References Cited (Backward Citations)
US2088595A
Cited
US2146573A
Cited
US1954691A
Cited
US1982373A
Cited
US2093699A
Cited
US2090922A
Cited
US2244245A
Cited
US2226567A
Cited
US2240706A
Cited
US2233786A
Cited
US2312206A
Cited
US2412654A
Cited
US2485561A
Cited
US2446248A
Cited
US2554017A
Cited
US2543477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |