US3044987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segmented copolymers and process for preparing same
Assignee: EIDP Inc
•
Filing: 1958-08-05
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Granted: 1962-07-17
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Expires: 1978-08-05
Abstract
No abstract record available.
Inventors
- 👤 Schaefgen John Raymond
- 👤 Jr Joseph Clois Shivers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G69/00; Y; Y10; Y10S; Y10S264/00; Y10S264/77; Y10S525/00; Y10S525/927; Y10S8/00; Y10S8/18; Y10S8/21; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A SUBSTANTIALLY LINEAR SEGMENTED COPOLYMER CONISTING OF A MULTIPLICITY OF INTRALINEAR SEGMENTS OF TWO CLASSES CONNECTED BY ESTER LINKAGES, THE SEGMENTS OF THE FIRST CLASS BEING THE RESIDUES REMAINING AFTER REMOVAL OF THE TERMINAL ESTER-FORMING FUNCTIONAL GROUPS SELECTED FROM THE GROUP CONSISTING OF HYDROXYL, THIOL, CARBOXYL, AND ACID HALIDE FROM A DIFUNCTIONAL POLYMER HAVING A MELTING POINT BELOW ABOUT 50*C. AND A MOLECULAR WEIGHT ABOVE ABOUT 600, AND THE SEGMENTS OF THE SECOND CLASS CONTAINING AT LEAST ONE REPEATING UNIT OF A FIBER-FORMING POLYMER, SAID REPEATING UNIT BEING OF THE FORMULA-B-Q-A-Q-, WHEREIN-A-AND -B- ARE BIVALENT ORGANIC RADICALS, THE RADICAL-A-CONTAINING TERMINAL NITROGEN ATOMS TO EACH OF WHICH IS ATTACHED ONE OF THE INDICATED FREE VALENCES OF THE SAID RADICAL-A-, AND Q IS A BIVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
130 words
A SUBSTANTIALLY LINEAR SEGMENTED COPOLYMER CONISTING OF A MULTIPLICITY OF INTRALINEAR SEGMENTS OF TWO CLASSES CONNECTED BY ESTER LINKAGES, THE SEGMENTS OF THE FIRST CLASS BEING THE RESIDUES REMAINING AFTER REMOVAL OF THE TERMINAL ESTER-FORMING FUNCTIONAL GROUPS SELECTED FROM THE GROUP CONSISTING OF HYDROXYL, THIOL, CARBOXYL, AND ACID HALIDE FROM A DIFUNCTIONAL POLYMER HAVING A MELTING POINT BELOW ABOUT 50*C. AND A MOLECULAR WEIGHT ABOVE ABOUT 600, AND THE SEGMENTS OF THE SECOND CLASS CONTAINING AT LEAST ONE REPEATING UNIT OF A FIBER-FORMING POLYMER, SAID REPEATING UNIT BEING OF THE FORMULA-B-Q-A-Q-, WHEREIN-A-AND -B- ARE BIVALENT ORGANIC RADICALS, THE RADICAL-A-CONTAINING TERMINAL NITROGEN ATOMS TO EACH OF WHICH IS ATTACHED ONE OF THE INDICATED FREE VALENCES OF THE SAID RADICAL-A-, AND Q IS A BIVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
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US2360673A
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US2386445A
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US2547113A
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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) | 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 |