US2528384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deposition of materials by sedimentation
Assignee: AC Cossor Ltd
•
Filing: 1945-03-12
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Granted: 1950-10-31
•
Expires: 1965-03-12
Abstract
No abstract record available.
Inventors
- 👤 Mitchell Arthur George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:33
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
THE METHOD OF FORMING A FLUORESCENT SCREEN AS AN ADHERENT COATING OF A SUBSTANTIALLY WATER INSOLUBLE FLUORIESCENT POWDER UPON A FOUNDATION WHICH COMPRISES COVERING SAID FOUNDATION WITH A SLIGHTLY ALKALINE AQUEOUS SOLUTION OVERSATURATED WITH AN HYDROXIDE OF ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, ZINC AND COPPER AND HAVING THE PROPETIES OF VERY LOW SOLUBILITY IN WATER AND OF FORMING A GELATINOUS PRECIPITATE IN COMING OUT OF SOLUTION, SAID SOLUTION ALSO CONTAINING A DISPERSION OF A POWDERED OXIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM OXIDE, MAGNESIUM OXIDE AND SILICON OXIDE, ALLOWING THE SOLUTION TO REMAIN AT REST WHEREBY A BINDER FILM OF GELATINOUS PRECIPITATE IS FORMED ON SAID FOUNDATION, DISPERSING IN THE REMAINING SOLUTION AN AQUEOUS SUSPENSION OF SAID INSOLUBLE FLUORESCENT POWDER, ALLOWING SAID REMAINING SOLUTION TO REMAIN AT REST WHEREBY SAID INSOLUBLE FLUORESCENT POWDER SETTLES OUT TO FORM A SCREEN ON SAID BINDER FILM, REMOVING THE REMAINING LIQUID AND DRYING SAID SCREEN.
Claim 2
Independent Claim
158 words
THE METHOD OF FORMING A FLUORESCENT SCREEN AS AN ADHERENT COATING OF A SUBSTANTIALLY WATER INSOLUBLE FLUORIESCENT POWDER UPON A FOUNDATION WHICH COMPRISES COVERING SAID FOUNDATION WITH A SLIGHTLY ALKALINE AQUEOUS SOLUTION OVERSATURATED WITH AN HYDROXIDE OF ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, ZINC AND COPPER AND HAVING THE PROPETIES OF VERY LOW SOLUBILITY IN WATER AND OF FORMING A GELATINOUS PRECIPITATE IN COMING OUT OF SOLUTION, SAID SOLUTION ALSO CONTAINING A DISPERSION OF A POWDERED OXIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM OXIDE, MAGNESIUM OXIDE AND SILICON OXIDE, ALLOWING THE SOLUTION TO REMAIN AT REST WHEREBY A BINDER FILM OF GELATINOUS PRECIPITATE IS FORMED ON SAID FOUNDATION, DISPERSING IN THE REMAINING SOLUTION AN AQUEOUS SUSPENSION OF SAID INSOLUBLE FLUORESCENT POWDER, ALLOWING SAID REMAINING SOLUTION TO REMAIN AT REST WHEREBY SAID INSOLUBLE FLUORESCENT POWDER SETTLES OUT TO FORM A SCREEN ON SAID BINDER FILM, REMOVING THE REMAINING LIQUID AND DRYING SAID SCREEN.
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) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |