US2963339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retarding and levelling agents
Assignee: —
•
Filing: —
•
Granted: 1960-12-06
•
Expires: 1977-12-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:01
CPC Classifications
D; D06; D06P; D06P3/00; D06P1/00; D06P1/44; D06P1/655; D06P1/66; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D06P1/38; D06P1/52; D06P1/5207; D06P1/5214; D06P1/5242; D06P3/02; D06P3/04; D06P3/24; D06P3/58; D06P3/60; D06P3/66; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A METHOD OF DYEING FIBROUS MATERIAL CONSISTING AT LEAST PREDOMINANTLY OF POLYACRYLONITRILE WHICH COMPRISES IMMERSING THE FIBROUS MATERIAL IN AN AQUEOUS DYEBATH CONTAINING A BASIC DYESTUFF AND FROM ABOUT 0.02 TO ABOUT 2.0% BY WEIGHT,RELATIVE TO THE WEIGHT OF THE FIBROUS MATERIAL, OF A QUATERNARY AMMONIUM COMPOUND OF THE FORMULA
Claim 2
Independent Claim
50 words
A METHOD OF DYEING FIBROUS MATERIAL CONSISTING AT LEAST PREDOMINANTLY OF POLYACRYLONITRILE WHICH COMPRISES IMMERSING THE FIBROUS MATERIAL IN AN AQUEOUS DYEBATH CONTAINING A BASIC DYESTUFF AND FROM ABOUT 0.02 TO ABOUT 2.0% BY WEIGHT,RELATIVE TO THE WEIGHT OF THE FIBROUS MATERIAL, OF A QUATERNARY AMMONIUM COMPOUND OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |