US2851423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent compositions
Assignee: Switzer Brothers Inc
•
Filing: 1954-03-31
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Granted: 1958-09-09
•
Expires: 1974-03-31
Abstract
No abstract record available.
Inventors
- 👤 Gaunt Thomas Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:07
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A FLUORESCENT COATING COMPOSITION COMPRISING A PIGMENT DYED WITH A RHODAMINE DYE, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 2,2'' DIHYDROXY NAPHTHALDAZINE AND YELLOW DERIVATIVES THEREOF AND A VEHICLE THEREFOR, SAID COMPOUND AND SAID DYE BEING PRESENT IN THE RATIO BY WEIGHT OF BETWEEN ABOUT 3.0 TO 1 AND ABOUT 35 TO 1.
Claim 2
Dependent Claim
54 words
A FLUORESCENT COATING COMPOSITION COMPRISING A PIGMENT DYED WITH A RHODAMINE DYE, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 2,2'' DIHYDROXY NAPHTHALDAZINE AND YELLOW DERIVATIVES THEREOF AND A VEHICLE THEREFOR, SAID COMPOUND AND SAID DYE BEING PRESENT IN THE RATIO BY WEIGHT OF BETWEEN ABOUT 3.0 TO 1 AND ABOUT 35 TO 1.
References Cited (Backward Citations)
US2113090A
Cited
DE728303C
Cited
US2653109A
Cited
US2440070A
Cited
US2498592A
Cited
US2464128A
Cited
FR1064955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |