US3384615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polyamides
Assignee: WR Grace and Co
•
Filing: 1966-05-16
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Granted: 1968-05-21
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Expires: 1986-05-16
Abstract
No abstract record available.
Inventors
- 👤 Elias R Agouri
- 👤 Muller Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:34
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/32; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A HEAT-STABILIZED POLYAMIDE COMPOSITION COMPRISING A SYNTHETIC LINEAR AMORPHOUS POLYAMIDE AND STABILIZING AMOUNTS OF, AN ALKYL-SUBSTITUTED DIPHENYLAMINE SAID ALKYL HAVING FROM 4-12 CARBON ATOMS; A PHOSPHOROUS COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHOROUS ACID, A SALT OF A PHOSPHOROUS ACID, AND AN ESTER OF PHOSPHOROUS ACID; AND A HALIDE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN CHLORIDE, HYDROGEN BROMIDE, HYDROGEN IODIDE, AN ALKALI METAL CHLORIDE, AN ALKALI METAL BROMIDE, AN ALKYL METAL IODIDE, AN ALKALI-EARTH METAL CHLORIDE, AN ALKALI EARTH METAL BROMIDE AND AN ALKALI EARTH METAL IODIDE.
Claim 2
Dependent Claim
89 words
A HEAT-STABILIZED POLYAMIDE COMPOSITION COMPRISING A SYNTHETIC LINEAR AMORPHOUS POLYAMIDE AND STABILIZING AMOUNTS OF, AN ALKYL-SUBSTITUTED DIPHENYLAMINE SAID ALKYL HAVING FROM 4-12 CARBON ATOMS; A PHOSPHOROUS COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHOROUS ACID, A SALT OF A PHOSPHOROUS ACID, AND AN ESTER OF PHOSPHOROUS ACID; AND A HALIDE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN CHLORIDE, HYDROGEN BROMIDE, HYDROGEN IODIDE, AN ALKALI METAL CHLORIDE, AN ALKALI METAL BROMIDE, AN ALKYL METAL IODIDE, AN ALKALI-EARTH METAL CHLORIDE, AN ALKALI EARTH METAL BROMIDE AND AN ALKALI EARTH METAL IODIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |