US2929802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic filaments of linear copolyurethanes
Assignee: EIDP Inc
•
Filing: 1955-01-31
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Granted: 1960-03-22
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Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Katz Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:26
CPC Classifications
C; C08; C08L; C08L75/00; Y; Y10; Y10S; Y10S264/00; Y10S264/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A FILAMENT HAVING AN ELASTIC RECOVERY ABOVE ABOUT 90%, A STRESS DECAY BELOW ABOUT 20%, AND AN ESSENTIALLY LINEAR STRUCTURE OF A SEGMENTED COPOLYURETHANE HAVING A POLYMER MELT TEMPERATURE ABOVE 150*C. AND AN INHERENT VISCOSITY OF AT LEAST 1 AS MEASURED IN A SOLUTION OF MCRESOL HAVING A CONCENTRATION OF 0.5 GRAM PER 100 ML. OPF SOLUTION, SAID COPOLYURETHANE CONSISTING ESSENTIALLY OF A MULTIPLICITY OF URETHANE SEGMENTS CONTAINING AT LEAST ONE REPEATING UNIT OF A FIBER-FORMING POLYURETHANE, SAID REPEATING UNIT BEING OF THE FORMULA
Claim 2
Dependent Claim
84 words
A FILAMENT HAVING AN ELASTIC RECOVERY ABOVE ABOUT 90%, A STRESS DECAY BELOW ABOUT 20%, AND AN ESSENTIALLY LINEAR STRUCTURE OF A SEGMENTED COPOLYURETHANE HAVING A POLYMER MELT TEMPERATURE ABOVE 150*C. AND AN INHERENT VISCOSITY OF AT LEAST 1 AS MEASURED IN A SOLUTION OF MCRESOL HAVING A CONCENTRATION OF 0.5 GRAM PER 100 ML. OPF SOLUTION, SAID COPOLYURETHANE CONSISTING ESSENTIALLY OF A MULTIPLICITY OF URETHANE SEGMENTS CONTAINING AT LEAST ONE REPEATING UNIT OF A FIBER-FORMING POLYURETHANE, SAID REPEATING UNIT BEING OF THE FORMULA
References Cited (Backward Citations)
FR892361A
Cited
FR52968E
Cited
US2660575A
Cited
US2692873A
Cited
BE519014A
Cited
FR1074451A
Cited
US2835654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |