US3600377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazo dyes for nylon
Assignee: Novartis Corp
•
Filing: 1968-01-16
•
Granted: 1971-08-17
•
Expires: 1988-01-16
Abstract
Abstract COMPOUNDS OF THE FORMULA 1-H3C-O-,2-A-N=N-,4-R-N(-R1)-SO2-BENZENE WHEREIN A IS A COUPLING COMPONENT CONTAINING A SULFONIC ACID GROUP AND R AND R1 ARE HYDROGEN OR ALKYL GROUPS OF 2-6 CARBON ATOMS WITH THE PROVISO THAT ONLY ONE OF R AND R1 IS HYDROGEN, PROVIDE YELLOW TO RED DYEINGS OF GOOD FASTNESS PROPERTIES AND EXCELLENT LEVELING CHARACTERISTICS ON SYNTHETIC POLYAMIDE FIBERS.
Inventors
- 👤 Hans Alfred Stingl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:28
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/10; C09B29/16; C09B29/02; C09B45/00; C09B45/02; C09B45/14; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |