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Patent EP0569035A1 successfully refreshed from Google Patents.
US3663508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polyesters and shaped structures made therefrom
Assignee: Hoechst Fibers Inc
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Filing: 1968-09-03
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Granted: 1972-05-16
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Expires: 1988-09-03
Abstract
Abstract THE PRESENT INVENTION RELATES TO NOVEL MODIFIED POLYESTERS CONTAINING IN THE POLYMER MOLECULE 0.1 TO 10 MOL PERCENT OF SULFONATE GROUPS-CONTAINING CHAIN MEMBERS OF THE GENERAL FORMULA X,((-)OOC-),(M-O-SO2-Y-O-)-BENZENE HAVING AN IMPROVED AFINITY FOR NATIONIC DYESTUFFS AND TO FILAMENTS, FIBERS AND FILM MADE OF THE SAID POLYESTERS.
Inventors
- 👤 Heinzhorst Mobius
- 👤 Gunter Keil
- 👤 Franz Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:28
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |