US3131079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brightening of fiber material by coating with 1, 3-diaryl- and 1, 3, 5-triaryl pyrazoline derivatives
Assignee: Bayer AG
•
Filing: 1961-07-13
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Granted: 1964-04-28
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Expires: 1981-07-13
Abstract
No abstract record available.
Inventors
- 👤 Wagner Annemarie
- 👤 Petersen Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:14
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/60; D06L4/614; D06L4/629
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A PROCESS FOR IMPROVING FIBERS WHICH COMPRISES APPLYING THERETO AN AQUEOUS SOLUTION OF A FLUORESCENT COMPOUND OF THE GENERAL FORMULA
Claim 2
Dependent Claim
20 words
A PROCESS FOR IMPROVING FIBERS WHICH COMPRISES APPLYING THERETO AN AQUEOUS SOLUTION OF A FLUORESCENT COMPOUND OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2567796A
Cited
US2639990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |