US2955902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the dyeing of polyester fibers
Assignee: Sandoz AG
•
Filing: 1959-06-01
•
Granted: 1960-10-11
•
Expires: 1979-06-01
Abstract
No abstract record available.
Inventors
- 👤 Merian Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:09
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/34; D06P3/52; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A METHOD OF DYEING A POLYTHENE TEREPHTHALATE FIBER WHICH COMPRISES TREATING THE FIBER AT A TEMPERATURE OF AT LEAST ABOUT 100*C. WITH AN AQUEOUS DISPERSION OF PHTHALOPERINONE IN FINELY DIVIDED FORM.
Claim 2
Independent Claim
31 words
A METHOD OF DYEING A POLYTHENE TEREPHTHALATE FIBER WHICH COMPRISES TREATING THE FIBER AT A TEMPERATURE OF AT LEAST ABOUT 100*C. WITH AN AQUEOUS DISPERSION OF PHTHALOPERINONE IN FINELY DIVIDED FORM.
References Cited (Backward Citations)
US2687940A
Cited
FR1075110A
Cited
US2670263A
Cited
US2628963A
Cited
US2757064A
Cited
GB730692A
Cited
US2782187A
Cited
US2849447A
Cited
US2833613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |