Patent US2824857A successfully refreshed from Google Patents.
US2824857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of an alkyleneimine and an organic carbonate
Assignee: Wyeth Holdings LLC
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Filing: 1954-06-28
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Granted: 1958-02-25
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Expires: 1974-06-28
Abstract
No abstract record available.
Inventors
- 👤 Erhart K Drechsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C07; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/16; C07D203/20; C08L; C08L75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A COMPOSITION COMPRISING A PRODUCT OF REACTION, AT A TEMPERATURE OF FROM ABOUT 20* C. TO ABOUT 100* C. OF INGREDIENTS COMPRISING (1) A 1,2-ALKYLENEIMINE WHEREIN THE NITROGEN ATOM IS UNSUBSTITUTED AND (2) A CYCLIC CARBONATE COMPOSED OF CARBON, HYDROGEN AND OXYGEN ATOMS, AND WHEREIN THE RING OXYGEN ATOMS ADJACENT THE CARBONATE GROUPING ARE EACH BONDED TO A RING CARBON ATOM, THE RING CONTAINING THE SAID OXYGEN AND CARBON ATOMS HAVING ONLY THREE CARBON ATOMS AND NO CARBON-TO-CARBON UNSATURATION, AND THE SAID REACTION PRODUCT IN LINEAR POLYMER FROM BEING CHARACTERIZED BY THE FACT THAT IT CONTAINS REACTIVE TERMINAL GROUPS, ONE OF WHICH IS HYDROXY AND THE OTHER OF WHICH IS THE RESIDUE OF AN ALKYLENEIMINE CORRESPONDING TO THE ALKYLENEIMINE OF (1).
Claim 2
Dependent Claim
121 words
A COMPOSITION COMPRISING A PRODUCT OF REACTION, AT A TEMPERATURE OF FROM ABOUT 20* C. TO ABOUT 100* C. OF INGREDIENTS COMPRISING (1) A 1,2-ALKYLENEIMINE WHEREIN THE NITROGEN ATOM IS UNSUBSTITUTED AND (2) A CYCLIC CARBONATE COMPOSED OF CARBON, HYDROGEN AND OXYGEN ATOMS, AND WHEREIN THE RING OXYGEN ATOMS ADJACENT THE CARBONATE GROUPING ARE EACH BONDED TO A RING CARBON ATOM, THE RING CONTAINING THE SAID OXYGEN AND CARBON ATOMS HAVING ONLY THREE CARBON ATOMS AND NO CARBON-TO-CARBON UNSATURATION, AND THE SAID REACTION PRODUCT IN LINEAR POLYMER FROM BEING CHARACTERIZED BY THE FACT THAT IT CONTAINS REACTIVE TERMINAL GROUPS, ONE OF WHICH IS HYDROXY AND THE OTHER OF WHICH IS THE RESIDUE OF AN ALKYLENEIMINE CORRESPONDING TO THE ALKYLENEIMINE OF (1).
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) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |