US2601178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing fluorescent screens
Assignee: Raytheon Co
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Filing: 1950-06-09
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Granted: 1952-06-17
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Expires: 1970-06-09
Abstract
No abstract record available.
Inventors
- 👤 Percy L Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:26
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
THE METHOD OF PRODUCING A ZINC SULPHIDE COATING ON A GLASS ENVELOPE WHICH COMPRISES FORMING SAID ENVELOPE OF A COMPOSITION CONTAINING ZINC OXIDE, IMMERSING SAID ENVELOPE IN A BATH OF MOLTEN ZINC CHLORIDE, EVACUATING SAID ENVELOPE, PROVIDING A LOW PRESSURE ATMOSPHERE OF HYDROGEN SULPHIDE WITHIN SAID ENVELOPE, AND SIMULTANEOUSLY APPLYING A DIRECT ELECTRICAL POTENTIAL BETWEEN AN ELECTRODE IN SAID BATH AND AN ELECTRODE IN THE INTERIOR OF SAID ENVELOPE SUCH THAT SAID BATH IS POSITIVE WITH RESPECT TO SAID ENVELOPE TO PRODUCE BY IONIC COMBINATION A COATING OF ZINC SULPHIDE ON THE IMMERSED PORTION OF SAID ENVELOPE, SAID POTENTIAL BEING SUFFICIENT TO PRODUCE A DISCHARGE THROUGH SAID HYDROGEN SULPHIDE.
Claim 2
Independent Claim
109 words
THE METHOD OF PRODUCING A ZINC SULPHIDE COATING ON A GLASS ENVELOPE WHICH COMPRISES FORMING SAID ENVELOPE OF A COMPOSITION CONTAINING ZINC OXIDE, IMMERSING SAID ENVELOPE IN A BATH OF MOLTEN ZINC CHLORIDE, EVACUATING SAID ENVELOPE, PROVIDING A LOW PRESSURE ATMOSPHERE OF HYDROGEN SULPHIDE WITHIN SAID ENVELOPE, AND SIMULTANEOUSLY APPLYING A DIRECT ELECTRICAL POTENTIAL BETWEEN AN ELECTRODE IN SAID BATH AND AN ELECTRODE IN THE INTERIOR OF SAID ENVELOPE SUCH THAT SAID BATH IS POSITIVE WITH RESPECT TO SAID ENVELOPE TO PRODUCE BY IONIC COMBINATION A COATING OF ZINC SULPHIDE ON THE IMMERSED PORTION OF SAID ENVELOPE, SAID POTENTIAL BEING SUFFICIENT TO PRODUCE A DISCHARGE THROUGH SAID HYDROGEN SULPHIDE.
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) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |