US2924549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper containing an organic fluorescent dye
Assignee: Bayer AG
•
Filing: 1955-12-15
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Granted: 1960-02-09
•
Expires: 1975-12-15
Abstract
No abstract record available.
Inventors
- 👤 Klein Caspar
- 👤 Podschus Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:15
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A COMPOSITION WHICH COMPRISES A FINELY DIVIDED WHITE, PRECIPITATED, AMORPHOUS, SILICEOUS PIGMENT OF THE GROUP CONSISTING OF SILICA AND SILICATES OF METALS OF THE GROUP CONSISTING OF ALUMINUM AND ALKALINE EARTH METALS CONTAINING AT LEAST TWO MOLES OF SIO2 PERMOLE OF METAL OXIDE IN WHICH SIO2 IS THE PREPONDERANT COMPONENT, HAVING AN AVERAGE ULTIMATE PARTICLE SIZE OF 0.015 TO 0.5 MICRON, AND A SMALL AMOUNT OF AN ORGANIC DYE WHICH FLUORESCES BLUE LIGHT, THE COLLECTIVE LIGHT EMITTED BY SAID DYE BEING BLUE-WHITE TO WHITE.
Claim 2
Dependent Claim
84 words
A COMPOSITION WHICH COMPRISES A FINELY DIVIDED WHITE, PRECIPITATED, AMORPHOUS, SILICEOUS PIGMENT OF THE GROUP CONSISTING OF SILICA AND SILICATES OF METALS OF THE GROUP CONSISTING OF ALUMINUM AND ALKALINE EARTH METALS CONTAINING AT LEAST TWO MOLES OF SIO2 PERMOLE OF METAL OXIDE IN WHICH SIO2 IS THE PREPONDERANT COMPONENT, HAVING AN AVERAGE ULTIMATE PARTICLE SIZE OF 0.015 TO 0.5 MICRON, AND A SMALL AMOUNT OF AN ORGANIC DYE WHICH FLUORESCES BLUE LIGHT, THE COLLECTIVE LIGHT EMITTED BY SAID DYE BEING BLUE-WHITE TO WHITE.
References Cited (Backward Citations)
US277383A
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US2694064A
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US2734830A
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US2702759A
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US2713055A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |