US3022131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for increasing the colorability of polyester terephthalate fibers and the products obtained thereby
Assignee: CHEM FAB GRUNAU VEB
•
Filing: 1957-09-03
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Granted: 1962-02-20
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Expires: 1977-09-03
Abstract
No abstract record available.
Inventors
- 👤 Selle Hans-Dieter
- 👤 Ruhnau Angela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:12
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/368; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/645; D06P3/00; D06P3/34; D06P3/52; D06P3/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
THE PROCESS FOR IMPROVING THE COLORABILITY OF FIBERS, WHICH COMPRISES CONTACTING POLYETHYLENE TEREPHTHALATE FIBER AT A TEMPERATURE OF ABOUT BETWEEN 80-100*C. WITH A TREATING AGENT CONSISTING ESSENTIALLY OF A N-METHYLCYCLOHEXYLIDENE-DIHYDROXYETHYLAMINE DISSOLVED IN AN ORGANIC SOLVENT HAVING A BOILING POINT ABOVE 80*C.
Claim 2
Dependent Claim
41 words
THE PROCESS FOR IMPROVING THE COLORABILITY OF FIBERS, WHICH COMPRISES CONTACTING POLYETHYLENE TEREPHTHALATE FIBER AT A TEMPERATURE OF ABOUT BETWEEN 80-100*C. WITH A TREATING AGENT CONSISTING ESSENTIALLY OF A N-METHYLCYCLOHEXYLIDENE-DIHYDROXYETHYLAMINE DISSOLVED IN AN ORGANIC SOLVENT HAVING A BOILING POINT ABOVE 80*C.
References Cited (Backward Citations)
US2417513A
Cited
GB609948A
Cited
US2646339A
Cited
US2647104A
Cited
US2901311A
Cited
US2938811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |