US2729606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of fluorescent tungstate
Assignee: Hartford National Bank and Trust Co
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Filing: 1952-08-26
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Granted: 1956-01-03
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Expires: 1972-08-26
Abstract
No abstract record available.
Inventors
- 👤 Rothschild Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:50
CPC Classifications
G; G21; G21K; G21K4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD FOR MAKIN FLUORESCENT TUNGSTATES, WHICH COMPRISES THE STEPS OF FIRING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM TUNGSTATE. MAGNESIUM TUNGSTATE AND ZINC TUNGSTATE WITH A WATER/SOLUBLE HALIDE SALTFLUX MATERIAL TO PRODUCE A FLUORESECENT TUNGSTATE, THEREAFTER WASHING THE FIRED TUNGSTATE WITH WATE TO RESIDUAL FLUX THEREFROM, MIXING SAID FIRED TUNGSTATE WITH AMMONIUM SULPHATE, AND FIRING SAID MIXTURE TO REDUCE AFTERGLOW OF THE FLUORESCENT TUNGSTATE.
Claim 2
Independent Claim
67 words
A METHOD FOR MAKIN FLUORESCENT TUNGSTATES, WHICH COMPRISES THE STEPS OF FIRING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM TUNGSTATE. MAGNESIUM TUNGSTATE AND ZINC TUNGSTATE WITH A WATER/SOLUBLE HALIDE SALTFLUX MATERIAL TO PRODUCE A FLUORESECENT TUNGSTATE, THEREAFTER WASHING THE FIRED TUNGSTATE WITH WATE TO RESIDUAL FLUX THEREFROM, MIXING SAID FIRED TUNGSTATE WITH AMMONIUM SULPHATE, AND FIRING SAID MIXTURE TO REDUCE AFTERGLOW OF THE FLUORESCENT TUNGSTATE.
References Cited (Backward Citations)
US1648510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |