US3011919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a multi-layer pick-up screen
Assignee: Rauland Borg Corp
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Filing: 1958-06-23
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Granted: 1961-12-05
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Expires: 1978-06-23
Abstract
No abstract record available.
Inventors
- 👤 Wilfrid F Niklas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:35
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD OF FORMING ON AN X-RADIATION TRANSPARENT SUBSTRATE A MULTI-LAYER PICK-UP SCREEN INCLUDING A TRANSPARENT BARRIER LAYER INTERMEDIATE A FLUORESCENT LAYER AND A PHOTOEMISSIVE LAYER WHICH METHOD COMPRISES THE STEPS OF: EVAPORATING ALUMINUM ONTO SAID FLUORESCENT LAYER, HEATING SAID ALUMINUM LAYER IN A DRY ATMOSPHERE HAVING A MAXIMUM HUMIDITY OF APPROXIMATELY 50% TO FORM A TIGHTLY PACKED ALUMINUM OXIDE LAYER OF SUBSTANTIALLY LESS THAN 80 ANGSTROMS THICKNESS, REPEATING SAID EVAPORATING AND HEATING STEPS TO FORM A BARRIER LAYER OF TIGHTLY PACKED ALUMINUM OXIDE TO A MINIMUM THICKNESS OF 80 ANGSTROMS, AND FORMING A PHOTOEMISSIVE LAYER OVER SAID BARRIER LAYER.
Claim 2
Independent Claim
100 words
THE METHOD OF FORMING ON AN X-RADIATION TRANSPARENT SUBSTRATE A MULTI-LAYER PICK-UP SCREEN INCLUDING A TRANSPARENT BARRIER LAYER INTERMEDIATE A FLUORESCENT LAYER AND A PHOTOEMISSIVE LAYER WHICH METHOD COMPRISES THE STEPS OF: EVAPORATING ALUMINUM ONTO SAID FLUORESCENT LAYER, HEATING SAID ALUMINUM LAYER IN A DRY ATMOSPHERE HAVING A MAXIMUM HUMIDITY OF APPROXIMATELY 50% TO FORM A TIGHTLY PACKED ALUMINUM OXIDE LAYER OF SUBSTANTIALLY LESS THAN 80 ANGSTROMS THICKNESS, REPEATING SAID EVAPORATING AND HEATING STEPS TO FORM A BARRIER LAYER OF TIGHTLY PACKED ALUMINUM OXIDE TO A MINIMUM THICKNESS OF 80 ANGSTROMS, AND FORMING A PHOTOEMISSIVE LAYER OVER SAID BARRIER LAYER.
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) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |