US2794013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of vinylene carbonate and ammonia or primary amine
Assignee: Wyeth Holdings LLC
•
Filing: 1953-12-23
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Granted: 1957-05-28
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Expires: 1973-12-23
Abstract
No abstract record available.
Inventors
- 👤 Erhart K Drechsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:49
CPC Classifications
C; C08; C08L; C08L75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A COMPOSITION COMPRISING THE CARBAMATE OBTAINED BY REACTION, AT A TEMPERATURE OF FROM ABOUT 20*C. TO ABOUT 100*C., OF INTEGREDIENTS COMPRISING VINYLENE CARBONATE AND AT LEAST ONE NITROGENOUS COMPOUND SELECTED FROM THE CLASS CONSISTING OF AMMONIA AND PRIMARY AMINES, THE LATTER HAVING ONLY SINGEL BONDS BETWEEN ANY ADJACENT CARBON ATOMS AND ANY STRAIGHT-CHAIN RADICAL WHICH IS A COMPONENT THEREOF, AND THE SAID NITROGENOUS COMPOUND BEING PRESENT IN AN AMOUNT SUFFICIENT TO SUPPLY AT LEAST ONE
Claim 2
Dependent Claim
75 words
A COMPOSITION COMPRISING THE CARBAMATE OBTAINED BY REACTION, AT A TEMPERATURE OF FROM ABOUT 20*C. TO ABOUT 100*C., OF INTEGREDIENTS COMPRISING VINYLENE CARBONATE AND AT LEAST ONE NITROGENOUS COMPOUND SELECTED FROM THE CLASS CONSISTING OF AMMONIA AND PRIMARY AMINES, THE LATTER HAVING ONLY SINGEL BONDS BETWEEN ANY ADJACENT CARBON ATOMS AND ANY STRAIGHT-CHAIN RADICAL WHICH IS A COMPONENT THEREOF, AND THE SAID NITROGENOUS COMPOUND BEING PRESENT IN AN AMOUNT SUFFICIENT TO SUPPLY AT LEAST ONE
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) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |