Patent US3787355A successfully refreshed from Google Patents.
US3787355A
Expired / Lapsed
US
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Stabilizing of polyamides
Assignee: Novartis Corp
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Filing: 1971-11-30
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Granted: 1974-01-22
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Expires: 1991-11-30
Abstract
Abstract DISCLOSED ARE STABILIZING SYSTEMS COMPRISING (A) A PHEBOLIC ANTIOXIDANT, (B) A DERIVATIVE OF PHOSPHORUS AND (C) A SALT OF DIVALENT MANGANESE WITH INORGANIC OR ORGANIC ACIDS. POLYAMIDE STABILIZED THEREWITH ARE LESS YELLOWED UNDER THERMOFIXING CONDITIONS AND THEY SHOW A GOOD LIGHT RESISTANCE AND EXCELLENT LONG TERM PROTECTION AGAINST LOSS OF TENSILE PROPERTIES.
Inventors
- 👤 H Linhart
- 👤 H Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:41
CPC Classifications
C; C08; C08K; C08K5/00; C08K13/00; C08K13/02
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |