Patent US3385820A successfully refreshed from Google Patents.
US3385820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes stabilized with a mixture of phenols
Assignee: EIDP Inc
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Filing: 1966-02-25
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Granted: 1968-05-28
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Expires: 1986-02-25
Abstract
No abstract record available.
Inventors
- 👤 Finlay Joseph Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:22
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A THERMOPLASTIC ELASTOMERIC COMPOSITION STABILIZED AGAINST HEAT- AND LIGHT-INDUCED DEGRADATION CONSISTING ESSENTIALLY OF AN ELASTOMER FROM THE GROUP CONSISTING OF POLYURETHANES AND POLYALKYLENEETHER POLYURETHANEAMIDES, HAVING INCORPORATED THEREIN ABOUT 0.25%-2% BY WEIGHT, BASED ON THE WEIGHT OF THE ELASTOMER, OF A STABILIZING MIXTURE OF (A) 4,4''-BUTYLIDENE-BIS(2-T-BUTYL-5-METHYL PHENOL) AND (B) 2,2''-METHYLENE-BIS(4-METHYL-6-T-BUTYL PHENOL) WHEREIN THE WEIGHT RATIO OF A TO B IS IN THE RANGE OF 2:1 TO 9:1.
Claim 2
Dependent Claim
66 words
A THERMOPLASTIC ELASTOMERIC COMPOSITION STABILIZED AGAINST HEAT- AND LIGHT-INDUCED DEGRADATION CONSISTING ESSENTIALLY OF AN ELASTOMER FROM THE GROUP CONSISTING OF POLYURETHANES AND POLYALKYLENEETHER POLYURETHANEAMIDES, HAVING INCORPORATED THEREIN ABOUT 0.25%-2% BY WEIGHT, BASED ON THE WEIGHT OF THE ELASTOMER, OF A STABILIZING MIXTURE OF (A) 4,4''-BUTYLIDENE-BIS(2-T-BUTYL-5-METHYL PHENOL) AND (B) 2,2''-METHYLENE-BIS(4-METHYL-6-T-BUTYL PHENOL) WHEREIN THE WEIGHT RATIO OF A TO B IS IN THE RANGE OF 2:1 TO 9:1.
References Cited (Backward Citations)
US2929802A
Cited
US2984645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |