US3377329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High melting polyolefin filamentary materials
Assignee: Celanese Corp
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Filing: 1966-12-22
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Granted: 1968-04-09
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Expires: 1986-12-22
Abstract
No abstract record available.
Inventors
- 👤 Noether Herman Dietrich
- 👤 Singleton Robert William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:02
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/04; D01F6/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
CREEP-RESISTANT STEREOSPECIFIC POLYPROPYLENE FILAMENTARY MATERIAL EXHIBITING A TENACITY IN EXCESS OF ABOUT 8 GRAMS PER DENIER, AN ELONGATION IN EXCESS OF ABOUT 10%, AND A POST YIELD DUCTILITY OF LESS THAN ABOUT 0.7, SAID FILAMENTARY MATERIAL HAVING BEEN PRODUCED BY EXTRUDING STEREOSPECIFIC POLYPROPYLENE IN LIQUID STATE THROUGH AN ORIFICE TO PRODUCE A FILAMENT, DRAWING SAID FILAMENT CONTINUOUSLY FROM SAID ORIFICE, DRAWING SAID FILAMENT A SECOND TIME AT A TEMPERATURE OF ABOUT TEMPERATURE TO 110*C. AND A DRAW RATIO RANGING FROM ABOUT 2:1 TO 10:1, AND DRAWING SAID FILAMENT A THIRD TIME AT A TEMPERATURE OF ABOUT 140 TO 150*C. AND A DRAW RATIO RANGING FROM ABOUT 1.1:1 TO 4:1.
Claim 2
Dependent Claim
109 words
CREEP-RESISTANT STEREOSPECIFIC POLYPROPYLENE FILAMENTARY MATERIAL EXHIBITING A TENACITY IN EXCESS OF ABOUT 8 GRAMS PER DENIER, AN ELONGATION IN EXCESS OF ABOUT 10%, AND A POST YIELD DUCTILITY OF LESS THAN ABOUT 0.7, SAID FILAMENTARY MATERIAL HAVING BEEN PRODUCED BY EXTRUDING STEREOSPECIFIC POLYPROPYLENE IN LIQUID STATE THROUGH AN ORIFICE TO PRODUCE A FILAMENT, DRAWING SAID FILAMENT CONTINUOUSLY FROM SAID ORIFICE, DRAWING SAID FILAMENT A SECOND TIME AT A TEMPERATURE OF ABOUT TEMPERATURE TO 110*C. AND A DRAW RATIO RANGING FROM ABOUT 2:1 TO 10:1, AND DRAWING SAID FILAMENT A THIRD TIME AT A TEMPERATURE OF ABOUT 140 TO 150*C. AND A DRAW RATIO RANGING FROM ABOUT 1.1:1 TO 4:1.
References Cited (Backward Citations)
US3013003A
Cited
US3048467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |