US3553290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spandex fibers stabilized with condensates of substituted phenols and divinyl benzenes
Assignee: EIDP Inc
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Filing: 1968-04-10
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Granted: 1971-01-05
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Expires: 1988-04-10
Abstract
Abstract RESINOUS CONDENSATES OF DIVINYL AROMATIC COMPOUNDS AND P-ALKYL PHENOLS WITH MOLECULAR WEIGHTS IN THE RANGE OF 1500 TO 4000 ARE INCORPORATED INTO SHAPED ARTICLES OF LONG-CHAIN SYNTHETIC SEGMENTED POLYURETHANES SUCH AS SPANDEX FIBERS TO PROVIDE RESISTANCE TO YELLOWING UPON EXPOSURE TO SMOG EVEN AFTER REPEATED DRY-CLEANING.
Inventors
- 👤 Oliver Larry Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:26
CPC Classifications
C; C08; C08L; C08L65/00; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3271; C08G18/3275; C08G61/00; C08G61/02; C08L75/00; C08L75/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |