Patent US2609319A successfully refreshed from Google Patents.
US3344121A
Expired / Lapsed
US
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Elastic thermoplastic polyesterurethanes prepared from (a) a polyester, (b) an aliphatic diisocyanate, (c) a diol, and optionally (d) a triol in a chlorinated aromatic solvent
Assignee: Rhone Poulenc SA
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Filing: 1964-05-06
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Granted: 1967-09-26
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Expires: 1984-05-06
Abstract
No abstract record available.
Inventors
- 👤 Phelisse Jean Auguste
- 👤 Salmon Michel Marie Roland
- 👤 Varagnat Jean Fleury Marius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:55
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/73; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0847; C08G18/0852; C08G18/28; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/664; C08G18/6644; C08G18/6648; C08G18/6655; D; D01; D01F; D01F6/00; D01F6/58; D01F6/70; Y; Y10; Y10S; Y10S528/00; Y10S528/902; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
THERMOPLASTIC ELASTOMERIC POLYESTER URETHANES WHICH ARE STABLE IN THE MOLTEN STATE, CAPABLE OF BEING MELT SPUN, AND RESISTANT TO DISCLORATION UNDER THE ACTION OF LIGHT, AND WHICH ARE OBTAINED BY CONDENSATION IN A CHLORINATED AROMATIC SOLVENT OF (A) ONE MOLECULAR PROPORTION OF AT LEAST ONE POLYESTER WITH TERMINAL HYDROXYL GROUPS AND A MOLECULAR WEIGHT OF 1200 TO 5000, OBTAINED BY CONDENSATION OF AT LEAST ONE ALIPHATIC DIBASIC ACID HAVING 4 TO 12 CARBON ATOMS WITH AT LEAST ONE DIOL HAVING 2 TO 10 CARBON ATOMS, AND (B) 2 TO 4 MOLECULAR PROPORTIONS OF AT LEAST ONE DIOL IN WHICH THE HYDROXYL GROUPS ARE PRIMARY AND WHICH HAS MORE THAN 3 CARBON ATOMS, WITH (C) AN ALIPHATIC DIISOCYANATE IN AMOUNTD SUCH THAT THE NUMBER OF ISOCYANATO GROUPS IS EQUIVALENT TO THE NUMBER OF HYDROXYL GROUPS PRESENT IN THE MIXTURES OF (A)+(B), AND SEPARATING THE POLYESTER URETHANE FORMED FROM THE SOLVENT.
Claim 2
Dependent Claim
149 words
THERMOPLASTIC ELASTOMERIC POLYESTER URETHANES WHICH ARE STABLE IN THE MOLTEN STATE, CAPABLE OF BEING MELT SPUN, AND RESISTANT TO DISCLORATION UNDER THE ACTION OF LIGHT, AND WHICH ARE OBTAINED BY CONDENSATION IN A CHLORINATED AROMATIC SOLVENT OF (A) ONE MOLECULAR PROPORTION OF AT LEAST ONE POLYESTER WITH TERMINAL HYDROXYL GROUPS AND A MOLECULAR WEIGHT OF 1200 TO 5000, OBTAINED BY CONDENSATION OF AT LEAST ONE ALIPHATIC DIBASIC ACID HAVING 4 TO 12 CARBON ATOMS WITH AT LEAST ONE DIOL HAVING 2 TO 10 CARBON ATOMS, AND (B) 2 TO 4 MOLECULAR PROPORTIONS OF AT LEAST ONE DIOL IN WHICH THE HYDROXYL GROUPS ARE PRIMARY AND WHICH HAS MORE THAN 3 CARBON ATOMS, WITH (C) AN ALIPHATIC DIISOCYANATE IN AMOUNTD SUCH THAT THE NUMBER OF ISOCYANATO GROUPS IS EQUIVALENT TO THE NUMBER OF HYDROXYL GROUPS PRESENT IN THE MIXTURES OF (A)+(B), AND SEPARATING THE POLYESTER URETHANE FORMED FROM THE SOLVENT.
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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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |