Patent US3255287A successfully refreshed from Google Patents.
US3255287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming synthetic knopped filaments
Assignee: Phillips Petroleum Co
•
Filing: 1963-09-19
•
Granted: 1966-06-07
•
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 16:42
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)
FR1167990A
Cited
US2866256A
Cited
BE566797A
Cited
GB833092A
Cited
US2935502A
Cited
FR1245063A
Cited
GB932538A
Cited
GB880059A
Cited
US2991508A
Cited
GB928825A
Cited
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 |