US2586304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of phosphors from attack by alkali vapors
Assignee: Westinghouse Electric Corp
•
Filing: 1948-06-12
•
Granted: 1952-02-19
•
Expires: 1968-06-12
Abstract
No abstract record available.
Inventors
- 👤 John W Coltman
- 👤 Richard L Longini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:50
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J29/385
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
AN ELECTRON DISCHARGE TUBE COMPRISING A VACUUM-TIGHT CONTAINER HAVING A LIGHT-EMITTING SCREEN COMPRISING PARTICLES OF AN ELECTRON PHOSPHOR EACH ENVELOPED BY COATING OF A METALLIC OXIDE INDIVIUAL TO IT.
Claim 2
Dependent Claim
29 words
AN ELECTRON DISCHARGE TUBE COMPRISING A VACUUM-TIGHT CONTAINER HAVING A LIGHT-EMITTING SCREEN COMPRISING PARTICLES OF AN ELECTRON PHOSPHOR EACH ENVELOPED BY COATING OF A METALLIC OXIDE INDIVIUAL TO IT.
References Cited (Backward Citations)
US2120916A
Cited
US2149849A
Cited
US2143095A
Cited
US2151496A
Cited
US2226567A
Cited
US2303563A
Cited
US2446617A
Cited
US2374311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |