US3583941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyester polymers containing alkali metal salts of sulfonated aliphatic compounds
Assignee: Celanese Corp
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Filing: 1966-09-26
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Granted: 1971-06-08
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Expires: 1986-09-26
Abstract
Abstract A LINEAR TEREPHTHALATE POLYESTER FIBER OR FILM-FORMING POLYMER CONTAINING MINOR AMOUNTS OF A METALLIZED COMPOUND HAVING THE FORMULA: Z(-O-C(-R)2-C(-R)2-C(-R)2-SO3-METAL)N WHEREIN N IS AN INTEGER OF 1 OR 2: WHEN N=1,Z IS AN ALKYL, ARYL, ARALKYL RADICAL, SUBSTUTUTED DERIVATIVES THEREOF WHEREIN THE SUBSTITUENT IS HYDROXY, ALKYL AND ALKOXY; WHEN N=2, Z IS AN ALKYLENE, ARYLENE, ARALKYLENE RADICAL. SUBSTITUTED DERIVATIVES THEREOF WHEREIN THE SUBSTITUENT IS HYDROXY, ALKYL AND ALKOXY; AND R, INDIVIDUALLY, IS HYDROGEN OR ALKYL RADICAL CONTAINING FROM 1 TO 6 CARBON ATOMS.
Inventors
- 👤 Louis E Trapasso
- 👤 Robert W Stackman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:45
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |