US2828217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminescent screen forming process
Assignee: Rauland Borg Corp
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Filing: 1955-04-29
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Granted: 1958-03-25
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Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 Nathan D Levin
- 👤 Frank J Kinsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:13
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD OF APPLYING A LUMINESCENT SCREEN TO A SOLID SUPPORT SUCH AS THE FACEPLATE OF A CATHODE-RAY TUBE ENVELOPE, WHICH METHOD COMPRISES: SETTLING A PHOSPHOR ONTO SAID SUPPORT THROUGH A FLUID COLUMN CONSISTING ESSENTIALLY OF A COLLODIAL SUSPENSION OF SILICIC ACID AND AT LEAST ONE ACCELERATOR IN A NEUTRAL SOLVENT; MAINTAINING A RESIDUAL PORTION OF SAID FLUID COLUMN IN CONTACT WITH SAID SUPPORT FOR A SUBSTANTIAL TIME INTERVAL AFTER SETTLING OF SAID PHOSPHOR TO CAUSE SAID PHOSPHOR TO ADHERE TO SAID SUPPORT; AND THEREAFTER REMOVING SAID RESIDUAL PORTION OF SAID FLUID COLUMN FROM SAID SUPPORT.
Claim 2
Independent Claim
96 words
A METHOD OF APPLYING A LUMINESCENT SCREEN TO A SOLID SUPPORT SUCH AS THE FACEPLATE OF A CATHODE-RAY TUBE ENVELOPE, WHICH METHOD COMPRISES: SETTLING A PHOSPHOR ONTO SAID SUPPORT THROUGH A FLUID COLUMN CONSISTING ESSENTIALLY OF A COLLODIAL SUSPENSION OF SILICIC ACID AND AT LEAST ONE ACCELERATOR IN A NEUTRAL SOLVENT; MAINTAINING A RESIDUAL PORTION OF SAID FLUID COLUMN IN CONTACT WITH SAID SUPPORT FOR A SUBSTANTIAL TIME INTERVAL AFTER SETTLING OF SAID PHOSPHOR TO CAUSE SAID PHOSPHOR TO ADHERE TO SAID SUPPORT; AND THEREAFTER REMOVING SAID RESIDUAL PORTION OF SAID FLUID COLUMN FROM SAID SUPPORT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |