US3016577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing shrinkproof filaments from low-pressure polyethylene
Assignee: Hoechst AG
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Filing: 1958-04-01
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Granted: 1962-01-16
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Expires: 1978-04-01
Abstract
No abstract record available.
Inventors
- 👤 Riggert Karlheinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:39
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS OF SUBSTANTIALLY REDUCING THE TENDENCY TO FIBRILLATE, OF SUBSTANTIALLY INCREASING THE ABRASION RESISTANCE, AND OF REDUCING THE SHRINKAGE AT ELEVATED TEMPERATURES OF ORIENTED FILAMENTS AND FIBERS MADE OF LOW PRESSURE POLYETHYLENE OF HIGH DENSITY, WHICH COMPRISES SUBJECTING SAID ARTICLES TO A HEAT TREATMENT EMPLOYING A HEATING MEDIUM AT A TEMPERATURE IN THE RANGE FROM ABOUT 135-250* C. FOR A PERIOD OF 1/10 SECOND TO 10 SECONDS WHEREBY THE FILAMENT IS STABILIZED AGAINST SHRINKAGE AND EXTENSIBILITY WITHOUT APPRECIABLE DECREASE IN TENACITY.
Claim 2
Dependent Claim
82 words
A PROCESS OF SUBSTANTIALLY REDUCING THE TENDENCY TO FIBRILLATE, OF SUBSTANTIALLY INCREASING THE ABRASION RESISTANCE, AND OF REDUCING THE SHRINKAGE AT ELEVATED TEMPERATURES OF ORIENTED FILAMENTS AND FIBERS MADE OF LOW PRESSURE POLYETHYLENE OF HIGH DENSITY, WHICH COMPRISES SUBJECTING SAID ARTICLES TO A HEAT TREATMENT EMPLOYING A HEATING MEDIUM AT A TEMPERATURE IN THE RANGE FROM ABOUT 135-250* C. FOR A PERIOD OF 1/10 SECOND TO 10 SECONDS WHEREBY THE FILAMENT IS STABILIZED AGAINST SHRINKAGE AND EXTENSIBILITY WITHOUT APPRECIABLE DECREASE IN TENACITY.
References Cited (Backward Citations)
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Cited
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Cited
US2325060A
Cited
US2420565A
Cited
US2517570A
Cited
US2824909A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |