US2929800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polytetramethylene ether polyurethane polymers
Assignee: EIDP Inc
•
Filing: 1953-06-30
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Granted: 1960-03-22
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Expires: 1973-06-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick B Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:26
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/089; C08G18/10; C08G18/16; C08G18/166; C08G18/168; C08G18/18; C08G18/1875; C08G18/28; C08G18/30; C08G18/302; C08G18/40; C08G18/48; C08G18/4825; C08G18/4833; C08G18/4854; C08G2110/00; C08G2110/0008; C08G2110/0083; C08J2375/00; C08J2375/04; C08J2375/08; Y; Y10; Y10S; Y10S220/00; Y10S220/14; Y10S273/00; Y10S273/08; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
THE PROCESS OF PREPARING A POLYTETRAMETHYLENE ETHERPOLYUIRETHANE POLYMER WHICH COMPRISES REACTING A POLYTETRAMETHYLENE ETHER GLYCOL HAVING A MOLECULAR WEIGHT OF AT LEAST 750 WITH A MOLAR EXCESS OF AN ORGANIC DIISOCYANATE, AND FURTHER REACTING THE RESULTING POLYMER WITH A CHAIN EXTENDING AGENT HAVING A PLURALITY OF ACTIVE HYDROGEN ATOMS CAPABLE OF REACTING WITH ISOCYANATES, NO MORE THAN TWO ATOMS IN THE MOLECULE OF THE SAID CHAIN EXTENDING AGENT HAVING ACTIVE HYDROGEN ATTACHED THERETO, SAID CHAIN EXTENDING AGENT BEING A MEMBER OF THE CLASS CONSISTING OF WATER, HYDROGEN SULFIDE, AND ORGANIC COMPOUNDS CONTAINING TWO, AND ONLY TWO, FUNCTIONAL GROUPS IN THE MOLECULE TO WHICH ARE ATTACHED ACTIVE HYDROGEN ATOMS, SAID GROUPS BEING CONNECTED TO ONE ANOTHER BY A CARBON CHAIN, SAID CHAIN BEING FREE FROM ANY INTRALINEAR UNSATURATION OTHER THAN CARBON TO CARBON UNSATURATION.
Claim 2
Dependent Claim
133 words
THE PROCESS OF PREPARING A POLYTETRAMETHYLENE ETHERPOLYUIRETHANE POLYMER WHICH COMPRISES REACTING A POLYTETRAMETHYLENE ETHER GLYCOL HAVING A MOLECULAR WEIGHT OF AT LEAST 750 WITH A MOLAR EXCESS OF AN ORGANIC DIISOCYANATE, AND FURTHER REACTING THE RESULTING POLYMER WITH A CHAIN EXTENDING AGENT HAVING A PLURALITY OF ACTIVE HYDROGEN ATOMS CAPABLE OF REACTING WITH ISOCYANATES, NO MORE THAN TWO ATOMS IN THE MOLECULE OF THE SAID CHAIN EXTENDING AGENT HAVING ACTIVE HYDROGEN ATTACHED THERETO, SAID CHAIN EXTENDING AGENT BEING A MEMBER OF THE CLASS CONSISTING OF WATER, HYDROGEN SULFIDE, AND ORGANIC COMPOUNDS CONTAINING TWO, AND ONLY TWO, FUNCTIONAL GROUPS IN THE MOLECULE TO WHICH ARE ATTACHED ACTIVE HYDROGEN ATOMS, SAID GROUPS BEING CONNECTED TO ONE ANOTHER BY A CARBON CHAIN, SAID CHAIN BEING FREE FROM ANY INTRALINEAR UNSATURATION OTHER THAN CARBON TO CARBON UNSATURATION.
References Cited (Backward Citations)
US2284896A
Cited
FR892107A
Cited
US2531392A
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US2625532A
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US2625531A
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US2625535A
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 |