Patent US3177564A successfully refreshed from Google Patents.
Patent US3275594A successfully refreshed from Google Patents.
US3275594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized polyamides containing (a) a copper compound and (b) a nitrogen containing antioxidant
Assignee: EIDP Inc
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Filing: 1962-10-01
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Granted: 1966-09-27
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Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 Bond William Bradford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:41
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A POLYAMIDE STABILIZED BY THE ADDITION OF FROM 0.11.0% BY WEIGHT OF AN ORGANIC ANTIOXIDANT SELECTED FROM THE GROUP CONSISTING OF A MIXTURE OF ABOUT 35% BY WEIGHT OF N,N''-DIPHENYL-PPHENYLENE DIAMINE AND 65% BY WEIGHT OF THE REACTION PRODUCT OF ACETONE AND DIPHENYLAMINE, N,N''-DINAPTHYL-P-PHENYLENEDIAMINE, AND N-PHENYL-N''-P-TOLUENESULFONYL -P-PHENYLENEDIAMINE, AND FROM 0.005-0.1% BY WEIGHT OF A SOLUBLE COPPER COMPOUND, SAID POLYAMIDE BEING SELECTED FROM THE GROUP CONSISTING OF POLYHEXYAMETHYLENE ADIPAMIDE, POLYHEXAMETHYLENE, ISOPHTHALAMIDE, POLYHEXAMETHYLENE SEBACAMIDE, POLYOCTAMETHYLENE OXAMIDE, POLY-2-METHYL HEXAMETHYLENE TEREPHTHALAMIDE, POLY-M-PHENYLENE ADIPAMIDE, POLY-MPHENYLENE SUBERAMIDE, POLY-M-XYLYLENE ADIPAMIDE, POLYHEXAMETHYLENE 5-T-BUTLISOPHTHALAMIDE, POLYHEXAMETHYLENE-2,5-DEMETHYL TEREPHTHALAMIDE, POLY-4,4''-DICYCLOHEXYLMETHANE AZELAMIDE, POLY-4,4''-DICYCLOHEXYLMETHANE SEBACAMIDE AND COPOLYMERS AND MELT BLENDS THEREOF.
Claim 2
Dependent Claim
97 words
A POLYAMIDE STABILIZED BY THE ADDITION OF FROM 0.11.0% BY WEIGHT OF AN ORGANIC ANTIOXIDANT SELECTED FROM THE GROUP CONSISTING OF A MIXTURE OF ABOUT 35% BY WEIGHT OF N,N''-DIPHENYL-PPHENYLENE DIAMINE AND 65% BY WEIGHT OF THE REACTION PRODUCT OF ACETONE AND DIPHENYLAMINE, N,N''-DINAPTHYL-P-PHENYLENEDIAMINE, AND N-PHENYL-N''-P-TOLUENESULFONYL -P-PHENYLENEDIAMINE, AND FROM 0.005-0.1% BY WEIGHT OF A SOLUBLE COPPER COMPOUND, SAID POLYAMIDE BEING SELECTED FROM THE GROUP CONSISTING OF POLYHEXYAMETHYLENE ADIPAMIDE, POLYHEXAMETHYLENE, ISOPHTHALAMIDE, POLYHEXAMETHYLENE SEBACAMIDE, POLYOCTAMETHYLENE OXAMIDE, POLY-2-METHYL HEXAMETHYLENE TEREPHTHALAMIDE, POLY-M-PHENYLENE ADIPAMIDE, POLY-MPHENYLENE SUBERAMIDE, POLY-M-XYLYLENE ADIPAMIDE, POLYHEXAMETHYLENE 5-T-BUTLISOPHTHALAMIDE, POLYHEXAMETHYLENE-2,5-DEMETHYL TEREPHTHALAMIDE, POLY-4,4''-DICYCLOHEXYLMETHANE AZELAMIDE, POLY-4,4''-DICYCLOHEXYLMETHANE SEBACAMIDE AND COPOLYMERS AND MELT BLENDS THEREOF.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |