Patent US3044990A successfully refreshed from Google Patents.
US3044990A
Expired / Lapsed
US
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Segmented polymer containing n-alkylated urethane groups
Assignee: EIDP Inc
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Filing: 1958-11-18
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Granted: 1962-07-17
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Expires: 1978-11-18
Abstract
No abstract record available.
Inventors
- 👤 Steuber Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:21
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6415; C08L; C08L75/00; Y; Y10; Y10S; Y10S264/00; Y10S264/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A SUBSTANTIALLY LINEAR SEGMENTED POLYMER CONSISTING ESSENTIALLY OF A PLURALITY OF INTRALINEAR SEGMENTS OF TWO CLASSES CONNECTED BY URETHANE LINKAGES, THE SEGMENTS OF THE FIRST CLASS BEING THE POLYMERIC RESIDUES REMAINING AFTER REMOVAL OF THE FUNCTION END GROUPS OF A DIFUNCTIONAL N-ALKYLATED URETHANE POLMER HAVING A MELTING POINT BELOW ABOUT 60*C. AND A MOLECULAR WEIGHT ABOVE ABOUT 600, THE SEGMENTS OF THE SECOND CLASS CONTAINING AT LEAST ONE REPEATING UNIT OF A FIBER-FORMING SYNTHETIC LINEAR POLYMER HAVING A MELTING POINT ABOVE 200*C. IN THE FIBER-FORMING MOLECULAR WEIGHT RANGE, SAID FIBER-FORMING POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF POLYAMIDE, POLYUREA, AND POLYURETHANE, SAID SEGMENTED POLYMER BEING REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
110 words
A SUBSTANTIALLY LINEAR SEGMENTED POLYMER CONSISTING ESSENTIALLY OF A PLURALITY OF INTRALINEAR SEGMENTS OF TWO CLASSES CONNECTED BY URETHANE LINKAGES, THE SEGMENTS OF THE FIRST CLASS BEING THE POLYMERIC RESIDUES REMAINING AFTER REMOVAL OF THE FUNCTION END GROUPS OF A DIFUNCTIONAL N-ALKYLATED URETHANE POLMER HAVING A MELTING POINT BELOW ABOUT 60*C. AND A MOLECULAR WEIGHT ABOVE ABOUT 600, THE SEGMENTS OF THE SECOND CLASS CONTAINING AT LEAST ONE REPEATING UNIT OF A FIBER-FORMING SYNTHETIC LINEAR POLYMER HAVING A MELTING POINT ABOVE 200*C. IN THE FIBER-FORMING MOLECULAR WEIGHT RANGE, SAID FIBER-FORMING POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF POLYAMIDE, POLYUREA, AND POLYURETHANE, SAID SEGMENTED POLYMER BEING REPRESENTED BY THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |