US3255287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming synthetic knopped filaments
Assignee: Phillips Petroleum Co
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Filing: 1963-09-19
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Granted: 1966-06-07
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Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Bottomley Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:31
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR FORMING KNOPPED MONOFILAMENTS OF POLYMER WHICH COMPRISES EXTRUDING FLUID NORMALLY SOLID POLYMER THRU A SMALL ROUND ORIFICE AHVING A LAND LENGTH TO DIAMETER RATIO IN THE RANGE OF 0.3:1.0 TO 3:1 SO AS TO FORM AN EXTRUDATE HAVING A REGULAR AND SUBSTANTIALLY UNIFORM "SAW-TOOTH" OR UNDULATING CONFIGURATION OR OUTLINE ALONG ITS SURFACE; THEREAFTER DRAWING SID EXTRUDATE INTO A FILAMENT WHEREBY KNOPS ARE FORMED ALONG SAID FILAMENT AT SECTIONS OF INCREASED THICKNESS ALONG SAID EXTRUDATE.
Claim 2
Dependent Claim
77 words
A PROCESS FOR FORMING KNOPPED MONOFILAMENTS OF POLYMER WHICH COMPRISES EXTRUDING FLUID NORMALLY SOLID POLYMER THRU A SMALL ROUND ORIFICE AHVING A LAND LENGTH TO DIAMETER RATIO IN THE RANGE OF 0.3:1.0 TO 3:1 SO AS TO FORM AN EXTRUDATE HAVING A REGULAR AND SUBSTANTIALLY UNIFORM "SAW-TOOTH" OR UNDULATING CONFIGURATION OR OUTLINE ALONG ITS SURFACE; THEREAFTER DRAWING SID EXTRUDATE INTO A FILAMENT WHEREBY KNOPS ARE FORMED ALONG SAID FILAMENT AT SECTIONS OF INCREASED THICKNESS ALONG SAID EXTRUDATE.
References Cited (Backward Citations)
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US2866256A
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Cited
GB833092A
Cited
US2935502A
Cited
FR1245063A
Cited
GB932538A
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Cited
GB928825A
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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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |