USRE27386E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oh soih
Assignee: —
•
Filing: 1970-09-01
•
Granted: 1972-06-13
•
Expires: 1990-09-01
Abstract
Abstract AN IMPROVEMENT IN THE DYEING AND PRINTING OF POLYAMIDE FIBERS, COMPRISING AS AN AFTER-TREATMENT, THE INTODUCTION OF SUCH FIBERS WHICH HAVE BEEN FRESHLY DYED OR PRINTED WITH A FIBER-REACTIVE DYESTUFF, PRIOR TO THE CONVENTIONAL DRYING, INTO AN AQUEOUS BATH WHICH CONTAINS A CONDENSATION PRODUCT OF DICYANODIAMIDE, UREA OR AN AMMONIUM SALT OF A MINERAL ACID CAPABLE OF SPLITTING OFF AMMONIA, AND FORMALDEHYDE; THE PH OF THE BATH IS ADJUSTED TO ABOUT 4 TO 5.5, AND THE BATH CONTAINING THE FIBERS IS THEN HEATED; ALSO THE AFORESAID AFTER-TREATMENT BATHS PER SE.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:11
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/02; D06P5/04; D06P5/06; D06P1/00; D06P1/44; D06P1/52; D06P1/56; D06P1/62; D06P1/621; D06P1/622; D06P1/625; D06P1/64; D06P1/642; D06P1/645; D06P1/655; D06P1/66; D06P3/00; D06P3/02; D06P3/04; D06P3/10; D06P5/08; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 0
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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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |