US3227656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent phosphor containing moisture absorbents
Assignee: International Business Machines Corp
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Filing: 1961-08-31
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Granted: 1966-01-04
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Expires: 1981-08-31
Abstract
No abstract record available.
Inventors
- 👤 Jeffreys Dennis Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:07
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145; H05B33/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
AN ELECTROLUMINESCENT PHOSPHOR HAVING INCORPORATED THEREIN, FROM ABOUT 1/4% TO 2% BY WEIGHT OF THE PHOSPHOR, A SLOW ACTING WATER ADSORBENT MATERIAL SELECTED FROM THE GROUP CONSISTING OF 3:3'':5:5'' TETRAMETHYL 4:4'' DIISOCYANATE DIPHENYLMETHANE, 3:3'' DI-TERTIARYBUTYL 4:4'' DIISOCYANATE DIPHENYLMETHANE, 3 METHYL 4:4'' DIISOCYANATE DIPHENYLMETHANE, 3:3'':3":5:5'':5" HEXAMETHYL 4:4'':4" TRIISOCYANATE TRIPHENYLMETHANE, AND 3:3'':5:5'' TETRACHLORO 4:4'' DIISOCYANATE DIPHENYLMETHANE.
Claim 2
Dependent Claim
54 words
AN ELECTROLUMINESCENT PHOSPHOR HAVING INCORPORATED THEREIN, FROM ABOUT 1/4% TO 2% BY WEIGHT OF THE PHOSPHOR, A SLOW ACTING WATER ADSORBENT MATERIAL SELECTED FROM THE GROUP CONSISTING OF 3:3'':5:5'' TETRAMETHYL 4:4'' DIISOCYANATE DIPHENYLMETHANE, 3:3'' DI-TERTIARYBUTYL 4:4'' DIISOCYANATE DIPHENYLMETHANE, 3 METHYL 4:4'' DIISOCYANATE DIPHENYLMETHANE, 3:3'':3":5:5'':5" HEXAMETHYL 4:4'':4" TRIISOCYANATE TRIPHENYLMETHANE, AND 3:3'':5:5'' TETRACHLORO 4:4'' DIISOCYANATE DIPHENYLMETHANE.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |