US3172862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic electroluminescent phosphors
Assignee: Dow Chemical Co
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Filing: 1960-09-29
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Granted: 1965-03-09
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Expires: 1980-09-29
Abstract
No abstract record available.
Inventors
- 👤 Edward F Gurnee
- 👤 Fernandez Reet Teoste
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:32
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
AN ELECTROLUMINESCENT PHOSPHOR WHICH COMPRISES BY WEIGHT; FROM ABOUT 99.85 TO ABOUT 85.5 OF A CONJUGATED ORGANIC COMPOUND HOST MEMBER SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF, (A) NAPHTHALENE (B) ANTHRACENE (C) PHENANTHRENE (D) PYRENE (E) BENZPYRENE (F) CHRYSENE (G) PICENE (H) CARBAZOLE (I) FLUORENE (J) BIPHENYL (K) TERPHENYLS (L) QUATERPHENYLS (M) TRIPHENYLENE OXIDE (N) DIHALOBIPHENYLS (O) TRANS-STILBENE, AND (P) 1,4-DIPHENYL BUTADIENE, FROM ABOUT 0.0001 TO ABOUT 10 PERCENT OF A CONJUGATED BENZENOID COMPOUND ACTIVATOR SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF, (A) ANTHRACENE (B) TETRACENE, AND (C) PENTACENE SAID ACTIVATOR BEING FURTHER CHARACTERIZED IN THAT IN SAID PHOSPHOR IT IS DIFFERENT COMPOUND THAN SAID HOST MEMBER AND FROM ABOUT 0.15 TO ABOUT 4.5 PERCENT OF A FINELY DIVIDED ELECTRICAL CONDUCTOR SELECTED FROM THE GROUP CONSISTING OF ESSENTIALLY OF, (A) METALS (B) METAL OXIDES (C) METAL SULFIDES, AND (D) CARBON, THE COMPONENTS OF SAID PHOSPHOR BEING IN INTIMATE CONTACT AND THERE SUBSTANTIALLY UNIFORM DISPERSION OF SAID COMPONENTS THROUGHOUT SAID PHOSPHOR.
Claim 2
Dependent Claim
160 words
AN ELECTROLUMINESCENT PHOSPHOR WHICH COMPRISES BY WEIGHT; FROM ABOUT 99.85 TO ABOUT 85.5 OF A CONJUGATED ORGANIC COMPOUND HOST MEMBER SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF, (A) NAPHTHALENE (B) ANTHRACENE (C) PHENANTHRENE (D) PYRENE (E) BENZPYRENE (F) CHRYSENE (G) PICENE (H) CARBAZOLE (I) FLUORENE (J) BIPHENYL (K) TERPHENYLS (L) QUATERPHENYLS (M) TRIPHENYLENE OXIDE (N) DIHALOBIPHENYLS (O) TRANS-STILBENE, AND (P) 1,4-DIPHENYL BUTADIENE, FROM ABOUT 0.0001 TO ABOUT 10 PERCENT OF A CONJUGATED BENZENOID COMPOUND ACTIVATOR SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF, (A) ANTHRACENE (B) TETRACENE, AND (C) PENTACENE SAID ACTIVATOR BEING FURTHER CHARACTERIZED IN THAT IN SAID PHOSPHOR IT IS DIFFERENT COMPOUND THAN SAID HOST MEMBER AND FROM ABOUT 0.15 TO ABOUT 4.5 PERCENT OF A FINELY DIVIDED ELECTRICAL CONDUCTOR SELECTED FROM THE GROUP CONSISTING OF ESSENTIALLY OF, (A) METALS (B) METAL OXIDES (C) METAL SULFIDES, AND (D) CARBON, THE COMPONENTS OF SAID PHOSPHOR BEING IN INTIMATE CONTACT AND THERE SUBSTANTIALLY UNIFORM DISPERSION OF SAID COMPONENTS THROUGHOUT SAID PHOSPHOR.
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |