Patent US3884989A successfully refreshed from Google Patents.
US3884989A
Expired / Lapsed
US
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Composition, process and article
Assignee: EIDP Inc
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Filing: 1971-01-20
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Granted: 1975-05-20
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Expires: 1991-01-20
Abstract
Abstract Synthetic organic matrix polymers containing up to 25% by weight of poly(1,4-benzamide) as an immiscible reinforcing polymer are disclosed. These reinforced polymers are suited for use in fiber form with the reinforcing polymer providing an improvement in fiber properties. Preferred polymers and fiber-forming processes are also described.
Inventors
- 👤 Richard N Blomberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:18
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/18; C08L33/20; C08L67/00; C08L67/02; C08L75/00; C08L77/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
FIBER CONSISTING ESSENTIALLY OF A FIRST SOLID PHASE COSISTING ESSENTIALLY OF A SYNTHETIC ORGAN FIBER-FORMING MATRIX POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYAMIDES, POLYESTER, SPANDEX POLYMERS, AND POLYACRYLIC, AND A SECOND SOLID PHASE DISTRIBUTED THROUGHOUT SAID MATRIX POLYMER AND PRESENT IN A REINFORCING AMOUNT OF FROM ABOUT 1% UP TO ABOUT 25% BY WEIGHT, BASED UPON THE WEIGHT OF SAID MATRIX POLYMER, CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FORMULA:
Claim 2
Dependent Claim
71 words
FIBER CONSISTING ESSENTIALLY OF A FIRST SOLID PHASE COSISTING ESSENTIALLY OF A SYNTHETIC ORGAN FIBER-FORMING MATRIX POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYAMIDES, POLYESTER, SPANDEX POLYMERS, AND POLYACRYLIC, AND A SECOND SOLID PHASE DISTRIBUTED THROUGHOUT SAID MATRIX POLYMER AND PRESENT IN A REINFORCING AMOUNT OF FROM ABOUT 1% UP TO ABOUT 25% BY WEIGHT, BASED UPON THE WEIGHT OF SAID MATRIX POLYMER, CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FORMULA:
Claim 3
Dependent Claim
18 words
Fiber of claim 1 wherein said reinforcing polymer constitutes less than about 20% by weight of said fiber.
Claim 4
Dependent Claim
18 words
Fiber of claim 1 wherein said reinforcing polymer constitutes less than about 10% by weight of said fiber.
References Cited (Backward Citations)
US3382305A
Cited
US3472819A
Cited
US3225011A
Cited
US3296213A
Cited
US3538059A
Cited
US3575933A
Cited
US3542719A
Cited
US3591673A
Cited
US3541067A
Cited
US3600350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |