US4229340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass fiber-reinforced polyethylene terephthalate/polyamide blends
Assignee: Celanese Corp
•
Filing: 1979-08-27
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Granted: 1980-10-21
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Expires: 1999-08-27
Abstract
Abstract An improved thermoplastic nylon molding resin comprising intimately mixed nylon molding resin and glass reinforcing agents in the presence of polyethylene terephthalate resin.
Inventors
- 👤 Melvin L. Druin
- 👤 John S. Gall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:28
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08K; C08K3/00; C08K3/40; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08L77/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
An improved thermoplastic molding resin comprising a synthetic linear polyamide polymer having a relative viscosity in the range of from about 35 to about 100; from about 5 to about 60 weight percent based on the total composition of glass fiber reinforcing agent; and from about 1.0 to about 50 weight percent based on the total resin weight of polyethylene terephthalate.
Claim 2
Dependent Claim
61 words
An improved thermoplastic molding resin comprising a synthetic linear polyamide polymer having a relative viscosity in the range of from about 35 to about 100; from about 5 to about 60 weight percent based on the total composition of glass fiber reinforcing agent; and from about 1.0 to about 50 weight percent based on the total resin weight of polyethylene terephthalate.
Claim 3
Dependent Claim
26 words
The product of claim 1 wherein the polyamide polymer is polyhexamethylene adipamide having a relative viscosity in the range of from about 45 to about 65.
Claim 4
Dependent Claim
38 words
The product of claim 2 wherein the polyethylene terephthalate is present from about 2.0 to about 40 weight percent based on the total resin weight and has an intrinsic viscosity of from about 0.45 to about 0.9 dl/g.
Claim 5
Dependent Claim
25 words
The product of claim 3 wherein the polyethylene terephthalate is present from about 2.5 to about 30 weight percent based on the total resin content.
Claim 6
Dependent Claim
25 words
The product of claim 3 wherein the polyethylene terephthalate is present from about 2.5 to about 20 weight percent based on the total resin content.
Claim 7
Dependent Claim
79 words
A process for producing an improved thermoplastic molding resin wherein a synthetic linear polyamide polymer having a relative viscosity in the range of from about 35 to about 100 is intimately mixed with about 5 to about 60 weight percent of the total molding composition of glass fiber reinforcing agent and from about 1.0 to about 50 weight percent based on the total resin of polyethylene terephthalate having an intrinsic viscosity of from about 0.2 to about 1.0 dl/g.
Claim 8
Dependent Claim
79 words
A process for producing an improved thermoplastic molding resin wherein a synthetic linear polyamide polymer having a relative viscosity in the range of from about 35 to about 100 is intimately mixed with about 5 to about 60 weight percent of the total molding composition of glass fiber reinforcing agent and from about 1.0 to about 50 weight percent based on the total resin of polyethylene terephthalate having an intrinsic viscosity of from about 0.2 to about 1.0 dl/g.
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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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |