Patent US3044989A successfully refreshed from Google Patents.
US3044989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segmented copolymers
Assignee: EIDP Inc
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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
- 👤 Jr Joseph Clois Shivers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:46
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6415; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/333; C08G65/33365; C08G65/33368; C08G65/338; C08G69/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A SUBSTANTIALLY LINEAR SEGMENTED COPOLYMER CONSISTING ESSENTIALLY OF A MULTIPLICITY OF SEGMENTS OF TWO CLASSES CONNECTED BY CHEMICAL LINKAGES, THE SEGMENTS OF THE FIRST CLASS BEING POLYMERIC RESIDUES REMAINING AFTER REMOVAL OF THE TERMINAL AMINE GROUPS OF A DIFUNCTIONAL POLYMER SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINE-TERMINATED POLYMERS HAVING A MELTING POINT BELOW ABOUT 50*C. AND A MOLECULAR WEIGHT ABOVE 600, SAID POLYMERIC RESIDUES CONSTITUTING AT LEAST ABOUT 48% BY WEIGHT FO SAID SEGMENTED COPOLYMER, THE SEGMENTS OF THE SECOND CLASS CONTAINING AT LEAST ONE REPEATING UNIT OF A FIBERFORMING POLYMER, SAID REPEATING UN IT BEING OF THE FORMULA -B-Q-A-Q-, WHEREIN -A- AND -B- ARE BIVALENT ORGANIC RADICALS, THE SAID 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
148 words
A SUBSTANTIALLY LINEAR SEGMENTED COPOLYMER CONSISTING ESSENTIALLY OF A MULTIPLICITY OF SEGMENTS OF TWO CLASSES CONNECTED BY CHEMICAL LINKAGES, THE SEGMENTS OF THE FIRST CLASS BEING POLYMERIC RESIDUES REMAINING AFTER REMOVAL OF THE TERMINAL AMINE GROUPS OF A DIFUNCTIONAL POLYMER SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINE-TERMINATED POLYMERS HAVING A MELTING POINT BELOW ABOUT 50*C. AND A MOLECULAR WEIGHT ABOVE 600, SAID POLYMERIC RESIDUES CONSTITUTING AT LEAST ABOUT 48% BY WEIGHT FO SAID SEGMENTED COPOLYMER, THE SEGMENTS OF THE SECOND CLASS CONTAINING AT LEAST ONE REPEATING UNIT OF A FIBERFORMING POLYMER, SAID REPEATING UN IT BEING OF THE FORMULA -B-Q-A-Q-, WHEREIN -A- AND -B- ARE BIVALENT ORGANIC RADICALS, THE SAID 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
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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 |