Patent US3258392A successfully refreshed from Google Patents.
US3258392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color stabilized paper containing fluorescent dye and titanate
Assignee: EIDP Inc
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Filing: 1963-09-16
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Granted: 1966-06-28
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Expires: 1983-09-16
Abstract
No abstract record available.
Inventors
- 👤 Harold C Brill
- 👤 Emslie Robert Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:11
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/675
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A COLOR STABILIZED PAPER CONTAINING CELLULOSIC FIBERS, FROM 0.06 TO 2% BY WEIGHT OF AN OPTICAL WHITENING FLUORESCENT DYE, AND AS A BRIGHTENING AGENT FOR SAID DYE AND THE PIGMENTING INGREDIENT FOR SAID PAPER, A PARTICULATE BASIC INORGANIC METAL TITANATE CORRESPONDING TO THE FORMULA M2O(TIO2)N IN WHICH M IS A METAL SELECTED FROM THE GROUP CONSISTING OF NA, K, LI, RB, CS, CA, MG, BA, SR AND ZN, AND N EQUALS 4 TO 9, SAID TITANATE BEING REFLECTIVE TO ULTRAVIOLET LIGHT IN THE RANGE OF 3000 TO 4000 A. AND CONSISTING ESSENTIALLY OF PARTICLES HAVING A DIAMETER RANGING FROM 0.1 TO 0.6 MICRONS.
Claim 2
Dependent Claim
103 words
A COLOR STABILIZED PAPER CONTAINING CELLULOSIC FIBERS, FROM 0.06 TO 2% BY WEIGHT OF AN OPTICAL WHITENING FLUORESCENT DYE, AND AS A BRIGHTENING AGENT FOR SAID DYE AND THE PIGMENTING INGREDIENT FOR SAID PAPER, A PARTICULATE BASIC INORGANIC METAL TITANATE CORRESPONDING TO THE FORMULA M2O(TIO2)N IN WHICH M IS A METAL SELECTED FROM THE GROUP CONSISTING OF NA, K, LI, RB, CS, CA, MG, BA, SR AND ZN, AND N EQUALS 4 TO 9, SAID TITANATE BEING REFLECTIVE TO ULTRAVIOLET LIGHT IN THE RANGE OF 3000 TO 4000 A. AND CONSISTING ESSENTIALLY OF PARTICLES HAVING A DIAMETER RANGING FROM 0.1 TO 0.6 MICRONS.
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |