Patent US2806847A successfully refreshed from Google Patents.
US2806847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinsxation
Assignee: —
•
Filing: —
•
Granted: 1957-09-17
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Expires: 1974-09-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:56
CPC Classifications
C; C07; C07D; C07D201/00; C07D201/02; C07D201/12; C07D201/08; C07D201/16; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/263; C07D207/267; C07D223/00; C07D223/02; C07D223/06; C07D223/08; C07D223/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
PROCESS FOR VINYLATING LACTAMS WHICH COMPRISES SATURATING A LIQUID MIXTURE CONTAINING A LACTAM HAVING HYDROGEN ON THE NITROGEN THEREOF AND AN ALKALI METAL CATALYST BASED ON THE METALS SODIUM AND POTASSIUM WITH ACETYLENE UNDER PRESSURE BELOW ABOUT 30*C., THE PRESSURE BEING BETWEEN 100 AND 500 POUNDS PER SQUARE INCH AND SUFFICIENT TO DISSOLVE IN THE REACTION MIXTURE AN AMOUNT OF ACETYLENE TO PROVIDE A CONVERSION OF AT LEAST 20% OF THE LACTAM, HEATING THE RESULTING MIXTURE AT A REACTING TEMPERATURE BETWEEN 150* AND 280*C. UNDER A PRESSURE BETWEEN 1000 AND 5000 POUNDS PER SQUARE INCH AND SUFFICIENT TO MAINTAIN THE MIXTURE ENTIRELY IN LIQUID PHASE, AND SEPARATING AN N-VINYL LACTAM.
Claim 2
Dependent Claim
110 words
PROCESS FOR VINYLATING LACTAMS WHICH COMPRISES SATURATING A LIQUID MIXTURE CONTAINING A LACTAM HAVING HYDROGEN ON THE NITROGEN THEREOF AND AN ALKALI METAL CATALYST BASED ON THE METALS SODIUM AND POTASSIUM WITH ACETYLENE UNDER PRESSURE BELOW ABOUT 30*C., THE PRESSURE BEING BETWEEN 100 AND 500 POUNDS PER SQUARE INCH AND SUFFICIENT TO DISSOLVE IN THE REACTION MIXTURE AN AMOUNT OF ACETYLENE TO PROVIDE A CONVERSION OF AT LEAST 20% OF THE LACTAM, HEATING THE RESULTING MIXTURE AT A REACTING TEMPERATURE BETWEEN 150* AND 280*C. UNDER A PRESSURE BETWEEN 1000 AND 5000 POUNDS PER SQUARE INCH AND SUFFICIENT TO MAINTAIN THE MIXTURE ENTIRELY IN LIQUID PHASE, AND SEPARATING AN N-VINYL LACTAM.
References Cited (Backward Citations)
US2317864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |