US3726636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Albuminous-aminoplast precursor-urea dye composition for polyamide
Assignee: Novartis AG
•
Filing: 1971-08-19
•
Granted: 1973-04-10
•
Expires: 1991-08-19
Abstract
Abstract TEXTILE MATERIALS ON THE BASE OF SYNTHETIC OR NATURAL POLYAMIDE FIBERS ARE DYED OR PRINTED WITH WATER-SOLUBLE WOOL-DYESTUFFS IN THE PRESENCE OF (A) AN AMINOPLAST PRECONDENSATE AND AN ACID CURING CATALYST, (B) UREA, THIOUREA OR GUANIDINE, (C) A HYDROXYALKYLECELLULOSE AND (D) AN ALBUMINOUS SUBSTANCE. AFTER DYEING OR PRINTING THE MATERISLS ARE STREAMED WITHOUT INTERMEDIATE DYING. THIS PROCESS PROVES PARTICULARLY ADVANTAGEOUS IN PRINTING OR PADDING THICK OR STIFF MATERIALS SUCH AS FLEECES, FELTS OR CARPET WEBS.
Inventors
- 👤 W Baderscher
- 👤 Richelle T De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:06
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/06; D06P1/00; D06P1/44; D06P1/46; D06P1/48; D06P1/50; D06P1/52; D06P1/56; D06P1/64; D06P1/642; D06P1/649; D06P1/6491; D06P1/6494; D06P3/046; D06P3/10; 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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |