US2869969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formaldehyde as an assistant in the dyeing of polyester fibers and blends thereof athigh temperatures
Assignee: EIDP Inc
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Filing: 1955-08-22
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Granted: 1959-01-20
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Expires: 1975-08-22
Abstract
No abstract record available.
Inventors
- 👤 Schulze Ferdinand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:12
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/65106; D06P1/65112; D06P3/00; D06P3/02; D06P3/04; D06P3/14; D06P3/34; D06P3/52; D06P3/54; D06P3/82; D06P3/8204; D06P3/8214; Y; Y10; Y10S; Y10S8/00; Y10S8/905; Y10S8/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THE PROCESS OF DYEING LINEAR GLYCOL-DIBASIC ACID POLYESTER FIBERS AND FABRICS MADE THEREFROM WHICH COMPRISES SUBJECTING THE SAME IN A DYEING BATH HAVING A PH BETWEEN ABOUT 4.0 AND 5.5 TO A TEMPERATURE OF 225*F. TO 250*F. IN THE PRESENCE OF FORMALDEHYDE, SAID DYE BATH CONTAINING A DISPERSED DYE FOR THE SAID POLYESTER FIBERS.
Claim 2
Dependent Claim
54 words
THE PROCESS OF DYEING LINEAR GLYCOL-DIBASIC ACID POLYESTER FIBERS AND FABRICS MADE THEREFROM WHICH COMPRISES SUBJECTING THE SAME IN A DYEING BATH HAVING A PH BETWEEN ABOUT 4.0 AND 5.5 TO A TEMPERATURE OF 225*F. TO 250*F. IN THE PRESENCE OF FORMALDEHYDE, SAID DYE BATH CONTAINING A DISPERSED DYE FOR THE SAID POLYESTER FIBERS.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |