Patent US3555087A successfully refreshed from Google Patents.
US3555087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terephthalamides
Assignee: Wyeth Holdings LLC
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Filing: 1968-03-27
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Granted: 1971-01-12
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Expires: 1988-03-27
Abstract
Abstract COMPOUNDS OF THE FORMULA: 1,4-BIS(R-NH-),2,5-BIS(B-NH-CO-)BENZENE WHEREIN B IS HYDROGEN, ALKYL OF UP TO 4 CARBON ATOMS, OR BENZYL AND R IS AN AROMATIC RADICAL SELECTED FROM THE GROUP CONSISTING OF NAPHTHYL, 9-ETHYLCARBAZYL, QUINOLYL, PYRIDYL, AND PHENYL HAVING UP TO 2 SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF ALKYL OF UP TO 12 CARBON ATOMS, ACETAMINDO, CHLORO, BROMO, TRIFLUOROMETHYL, AND METHOXY. USEFUL SELF COLORED FLUORESCENT MARKING COMPOSITIONS ARE OBTAINED BY INCORPORATING THE COMPOUNDS OF THE FOREGOING FORMULA IN SUITABLE LIQUID VEHICLES.
Inventors
- 👤 Vincent Gerard Grosso
- 👤 Boydston Lewis Butterfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:50
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/38; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/88; C09; C09D; C09D11/00; C09D11/50; C09K; C09K11/00; C09K11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |