US3674420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycloalkanone or alkyl aryl ketone assisting cationic dye and aromatic polyamide dyeing therewith
Assignee: Sandoz Inc
•
Filing: 1969-10-22
•
Granted: 1972-07-04
•
Expires: 1989-10-22
Abstract
Abstract A DYE ASSISTANT FOR AROMATIC POLYAMIDE FIBROUS MATERIAL IS SHOWN. THE DYE ASSISTANT COMPRISES WITHER A CYCLIC ALIPHATIC KETONE SUCH AS CYCLOHEXANONE OR AN ARYL KETONE SUCH AS ACETOPHENONE. A METHOD OF DYEING SUCH AROMATIC POLYAMIDE MATERIAL WHICH INCLUDES THE DYE ASSISTANT SET FORTH HEREINABOVE IS ALSO SHOWN. THE METHOD INCLUDES THE STEPS OF IMMERSING THE FIBER IN A DYE BATH INCLUDING WATER, A SURFACTANT, AND THE DYE ASSISTANT OF THE INVENTION AND THENCE PRESSURRIZING THE BATH AND RAISING THE TEMPERATURE THEREOF UNTIL THE DYEING IS COMPLETED.
Inventors
- 👤 Ira Sapers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:42
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/242; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/65106; D06P1/65112; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924; Y10S8/925
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |