Patent US3379675A successfully refreshed from Google Patents.
US3379675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyether urethane stabilized with a benzotriazole and a tris-phenol
Assignee: EIDP Inc
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Filing: 1964-07-30
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Granted: 1968-04-23
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Expires: 1984-07-30
Abstract
No abstract record available.
Inventors
- 👤 Jensen Arnold William
- 👤 Ozolins Mara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:41
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/16; C08K5/34; C08K5/3467; C08K5/3472; C08K5/3475
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A POLYETHER-BASED SPANDEX FIBER STABILIZED AGAINST ULTRAVIOLET LIGHT DEGRADATION BY HAVING INCORPORATED THEREIN A TABILIZING QUANTITY OF (A) A 2-(O-HYDROXYPHENYL)-BENZOTRIAZOLE AND (B) 1,3,5-TRIMETHYL-2,4,6-TRIS(3,5DI-T-BUTYL--HYDROXYBENZYL)BENZENE.
Claim 2
Dependent Claim
23 words
A POLYETHER-BASED SPANDEX FIBER STABILIZED AGAINST ULTRAVIOLET LIGHT DEGRADATION BY HAVING INCORPORATED THEREIN A TABILIZING QUANTITY OF (A) A 2-(O-HYDROXYPHENYL)-BENZOTRIAZOLE AND (B) 1,3,5-TRIMETHYL-2,4,6-TRIS(3,5DI-T-BUTYL--HYDROXYBENZYL)BENZENE.
References Cited (Backward Citations)
US2915496A
Cited
US3062895A
Cited
US3271339A
Cited
US3239474A
Cited
US3271337A
Cited
US3206431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |