US2951773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating electrical discharge tubes
Assignee: US Philips Corp
•
Filing: 1956-02-07
•
Granted: 1960-09-06
•
Expires: 1976-02-07
Abstract
No abstract record available.
Inventors
- 👤 Helle Fritz Kurt
- 👤 Rosenfeldt Gunther Joh Theodor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:10
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/88; C; C03; C03C; C03C17/00; C03C17/22; H01B; H01B1/00; H01B1/14; H01B1/18; C03C2217/00; C03C2217/20; C03C2217/29; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/112; H01J2229/00; H01J2229/88; H01J2229/882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD OF APPLYING A CONDUCTIVE COATING TO THE WALL OF AN ELECTRIC DISCHARGE TUBE, COMPRISING FORMING A SUSPENSION OF GRAPHITE AND AN ALKALI METAL SILICATE WITH A MOLECULAR RATIO OF ALKALINE OXIDE TO SILICON DIOXIDE BETWEEN 1:5 AND 1:7 AND SPRAYING SAID SUSPENSION ON THE TUBE WALL WHICH IS PREHEATED TO 50 TO 80*C.
Claim 2
Independent Claim
55 words
A METHOD OF APPLYING A CONDUCTIVE COATING TO THE WALL OF AN ELECTRIC DISCHARGE TUBE, COMPRISING FORMING A SUSPENSION OF GRAPHITE AND AN ALKALI METAL SILICATE WITH A MOLECULAR RATIO OF ALKALINE OXIDE TO SILICON DIOXIDE BETWEEN 1:5 AND 1:7 AND SPRAYING SAID SUSPENSION ON THE TUBE WALL WHICH IS PREHEATED TO 50 TO 80*C.
References Cited (Backward Citations)
US1518807A
Cited
US2264892A
Cited
US2706691A
Cited
US2661438A
Cited
US2709414A
Cited
US2689804A
Cited
US2803566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |