Patent US3134833A successfully refreshed from Google Patents.
US3134833A
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Production of asymmetrically birefringent, crystallizable, thermoplastic polymer filaments
Assignee: EIDP Inc
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Filing: 1961-12-26
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Granted: 1964-05-26
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Ciporin Leon
- 👤 Pierre R Latour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:00
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/22; D01D5/23; D02; D02J; D02J1/00; D02J1/22; D02J1/223; D02J1/224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN THE PROCESS OF ORIENTING FILAMENTS COMPOSED OF A CRYSTALLIZABLE, THERMOPLASTIC POLYNER WHICH HAVE AN ASYMMETRIC BIREFRINGENCE DIFFERENTIAL ACROSS THEIR DIAMETER BY DRAWING THE FILAMENTS AT A TEMPERATURE ABOVE THE SECOND ORDER TRANSITION TEMPERATURE, TG, OF THE POLYMER; THE IMPROVEMENT WHICH COMPRISES COOLING THE FILAMENTS TO A TEMPERATURE BELOW TG BY CONTACTING THEM, SUBSTANTIALLY IMMEDIATELY AFTER THEY HAVE BEEN DRAWN, WITH A LIQUID MAINTAINED BELOW TG.
Claim 2
Dependent Claim
66 words
IN THE PROCESS OF ORIENTING FILAMENTS COMPOSED OF A CRYSTALLIZABLE, THERMOPLASTIC POLYNER WHICH HAVE AN ASYMMETRIC BIREFRINGENCE DIFFERENTIAL ACROSS THEIR DIAMETER BY DRAWING THE FILAMENTS AT A TEMPERATURE ABOVE THE SECOND ORDER TRANSITION TEMPERATURE, TG, OF THE POLYMER; THE IMPROVEMENT WHICH COMPRISES COOLING THE FILAMENTS TO A TEMPERATURE BELOW TG BY CONTACTING THEM, SUBSTANTIALLY IMMEDIATELY AFTER THEY HAVE BEEN DRAWN, WITH A LIQUID MAINTAINED BELOW TG.
References Cited (Backward Citations)
GB824577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |