US3561913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dyeing synthetic fibers
Assignee: Toyobo Co Ltd
•
Filing: 1967-11-17
•
Granted: 1971-02-09
•
Expires: 1987-11-17
Abstract
Abstract SYNTHETIC FIBERS-ESPECIALLY POLYESTER FIBERS, ARE DYED BY MEANS OF A REACTION PRODUCT OF A COMPOUND OF THE FORMULA A-R-B-R'' AND A COMPOUND OF THE FORMULA 1-(Y=),4-(X-N=)-C WHEREIN A IS AN AROMATIC NUCLEUS, B IS AN AROMATIC NUCLEUS OR A QUINOID RING, R IS -NH- OR -N=, R'' IS -OH OR =O, C IS A QUINOID RING, X IS A HALOGEN ATOM AND Y IS =O, =N-X,=N-OCCH3 OR PHENYL-SO2-N= THE DYED FIBERS, OF DARK SHADE, ARE OF EXCELLENT FASTNESS TO LIGHT, SUBLIMATION, WASHING AND DRY-CLEANING.
Inventors
- 👤 Hideaki Munakata
- 👤 Kazuo Watanabe
- 👤 Yoshikazu Arimatsu
- 👤 Toshiharu Sugihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:26
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/32; Y; Y10; Y10S; Y10S8/00; Y10S8/904; Y10S8/92; Y10S8/922; Y10S8/924; Y10S8/927
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |