US3892972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a luminescent surface containing substituted sulfonamido and carboxamido phenyl quinazolones
Assignee: Wyeth Holdings LLC
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Filing: 1973-04-25
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Granted: 1975-07-01
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Expires: 1993-04-25
Abstract
Abstract Fluorescent compositions which are not visible under ordinary light, said compositions having organic quinazolone compounds as the fluorescent component.
Inventors
- 👤 Albert Anthony Cevasco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:11
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A METHOD FOR CAUSING A COATED SURFACE TO FLUORESCE WHICH COMPRISES, COATING SAID SURFACE WITH A COMPOSITION CONTAINING A COMPOUND OF THE FORMULA:
Claim 2
Independent Claim
23 words
A METHOD FOR CAUSING A COATED SURFACE TO FLUORESCE WHICH COMPRISES, COATING SAID SURFACE WITH A COMPOSITION CONTAINING A COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
US3740402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |