US3288581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing fibers
Assignee: PPG Industries Inc
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Filing: 1963-10-28
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Granted: 1966-11-29
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Expires: 1983-10-28
Abstract
No abstract record available.
Inventors
- 👤 John V Schweppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:10
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/0203; C03B37/0213; C03B37/0209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD OF FORMING THERMOPLASTIC FIBERS WHICH COMPRISES DRAWING A PLURALITY OF FILAMENTS FROM STREAMS OF THE THERMOPLASTIC MATERIAL PASSING THROUGH ORIICES ALIGNED IN A PLURALITY OF ROWS IN THE FLAT PLANAR BOTTOM OF A BUSHING, AND DIRECTING A PLURALITY OF INDIVIDUAL STREAMS OF A COOLING GAS INITIALLY BETWEEN THE ROWS OF FILAMENTS JUST BELOW THE BUSHING AND THE ORIFICES FROM AT LEAST ONE SIDE OF THE BUSHING, SAID STREAMS OF GAS EACH HAVING A REYNOLDS NUMBER LESS THAN 2100 AND A PRESSURE SUFFICIENT TO INITIALLY PROPEL THE GAS INTO AND THROUGHOUT THE ENTIRE ZONE DIRECTLY BELOW THE BUSHING AVOIDING DIRECT IMPINGEMENT OF ANY AIR STREAM BELOW SAID BUSHING ONTO A FILAMENT PROVIDING A CONTROLLED ATMOSPHERE SURROUNDING THE ORIFICES AND THE STREAMS PASSING THERETHROUGH.
Claim 2
Independent Claim
124 words
A METHOD OF FORMING THERMOPLASTIC FIBERS WHICH COMPRISES DRAWING A PLURALITY OF FILAMENTS FROM STREAMS OF THE THERMOPLASTIC MATERIAL PASSING THROUGH ORIICES ALIGNED IN A PLURALITY OF ROWS IN THE FLAT PLANAR BOTTOM OF A BUSHING, AND DIRECTING A PLURALITY OF INDIVIDUAL STREAMS OF A COOLING GAS INITIALLY BETWEEN THE ROWS OF FILAMENTS JUST BELOW THE BUSHING AND THE ORIFICES FROM AT LEAST ONE SIDE OF THE BUSHING, SAID STREAMS OF GAS EACH HAVING A REYNOLDS NUMBER LESS THAN 2100 AND A PRESSURE SUFFICIENT TO INITIALLY PROPEL THE GAS INTO AND THROUGHOUT THE ENTIRE ZONE DIRECTLY BELOW THE BUSHING AVOIDING DIRECT IMPINGEMENT OF ANY AIR STREAM BELOW SAID BUSHING ONTO A FILAMENT PROVIDING A CONTROLLED ATMOSPHERE SURROUNDING THE ORIFICES AND THE STREAMS PASSING THERETHROUGH.
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |