US3822263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactive anthraquinone dyestuffs containing a fluoropyrimidinyl group
Assignee: Bayer AG
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Filing: 1971-06-03
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Granted: 1974-07-02
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Expires: 1991-06-03
Abstract
Abstract THE PRESENT INVENTION RELATES TO VALUABLE NEW REACTIVE DYESTUFFS OF THE GENERAL CONSTITUTION 4-R2,5-R1,F-,(D-N(-R)-)-PYRIMIDINE IN THIS FORMULA D DENOTES THE RADICAL OF AN ORGANIC DYESTUFF, R IS HYDROGEN OR A LOWER ALKYL GROUP, R1 IS HYDROGEN OR SUBSTITUENT, R2 MEANS HYDROGEN, HALOGEN, OPTIONALLY SUBSTITUTED ALKYL, ALKENYL, ARALKYL OR ARYL RADICALS OR CARBOXYLIC ACID ESTER, CARBOXYLIC ACID AMIDE, ALKYL-SULPHONE AND ARYLSULPHONE GROUPS, AND F IS A FLUORO SUBSTITUENT.
Inventors
- 👤 H Bien
- 👤 E Klauke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:29
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/20
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |