Patent US3173977A successfully refreshed from Google Patents.
US3173977A
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Production of shaped objects from highmolecular polyolefins
Assignee: Dynamit Nobel AG
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Filing: 1955-11-15
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Granted: 1965-03-16
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Expires: 1975-11-15
Abstract
No abstract record available.
Inventors
- 👤 Esselmann Paul
- 👤 Fischer Hermann
- 👤 Wienand Michael
- 👤 Ristau Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:18
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN THE PRODUCTION OF OBJECTS OF LOW-PRESSURE POLYMERIZATION PRODUCED POLYOLEFINS, HAVING A MOLECULAR WEIGHT OF AT LEAST 40,000 BY EXTRUSION AT LEAST AT THEIR FLOW TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES DRAWING THE EXTRUDED POLYOLEFIN TO AT LEAST SIX TIMES ITS ORIGINAL LENGTH AT A TEMPERATURE WITHIN THE RANGE OF FROM BELOW SAID FLOW TEMPERATURE TO 90* BELOW SAID FLOW TEMPERATURE BUT NOT BELOW 90*C.
Claim 2
Dependent Claim
64 words
IN THE PRODUCTION OF OBJECTS OF LOW-PRESSURE POLYMERIZATION PRODUCED POLYOLEFINS, HAVING A MOLECULAR WEIGHT OF AT LEAST 40,000 BY EXTRUSION AT LEAST AT THEIR FLOW TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES DRAWING THE EXTRUDED POLYOLEFIN TO AT LEAST SIX TIMES ITS ORIGINAL LENGTH AT A TEMPERATURE WITHIN THE RANGE OF FROM BELOW SAID FLOW TEMPERATURE TO 90* BELOW SAID FLOW TEMPERATURE BUT NOT BELOW 90*C.
References Cited (Backward Citations)
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US2369191A
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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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |