Patent US2524049A successfully refreshed from Google Patents.
US2524049A
Expired / Lapsed
US
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Production of biuret
Assignee: Individual
•
Filing: 1947-03-25
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Granted: 1950-10-03
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Expires: 1967-03-25
Abstract
No abstract record available.
Inventors
- 👤 Paul W Garbo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:53
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/18; C07C273/1872; C07C273/1881
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE PROCESS FOR PRODUCING BIURET WHICH COMPRISES HEATING A MASS OF UREA SUBSTANTIALLY FREE OF REACTIVE SUBSTANCES AT A TEMPERATURE IN THE RANGE OF ABOUT 130* TO ABOUT 200*C. TO EFFECT THE CONDENSATION OF PAIRS OF UREA MOLECULES INTO BIURET MOLECULES, EFFECTING SAID CONDENSATION OF UREA INTO BIURET IN THE PRESENCE OF A SMALL QUANTITY OF AN INORGANIC OXYGEN-CONTAINING COMPOUND CONTAINING AN ELEMENT SELECTED FROM GROUPS V AND VI OF THE MENDELIEFF PERIODIC SYSTEM AND HAVING AN ATOMIC NUMBER BETWEEN 15 AND 92, INCLUSIVE, AS CATALYST, SAID SMALL QUANTITY OF CATALYST BEING NOT MORE THAN ABOUT 5% OF THE WEIGHT OF SAID MASS OF UREA, AND RECOVERING THE THUS PRODUCED BIURET FROM THE RESULTING REACTION MASS.
Claim 2
Dependent Claim
116 words
THE PROCESS FOR PRODUCING BIURET WHICH COMPRISES HEATING A MASS OF UREA SUBSTANTIALLY FREE OF REACTIVE SUBSTANCES AT A TEMPERATURE IN THE RANGE OF ABOUT 130* TO ABOUT 200*C. TO EFFECT THE CONDENSATION OF PAIRS OF UREA MOLECULES INTO BIURET MOLECULES, EFFECTING SAID CONDENSATION OF UREA INTO BIURET IN THE PRESENCE OF A SMALL QUANTITY OF AN INORGANIC OXYGEN-CONTAINING COMPOUND CONTAINING AN ELEMENT SELECTED FROM GROUPS V AND VI OF THE MENDELIEFF PERIODIC SYSTEM AND HAVING AN ATOMIC NUMBER BETWEEN 15 AND 92, INCLUSIVE, AS CATALYST, SAID SMALL QUANTITY OF CATALYST BEING NOT MORE THAN ABOUT 5% OF THE WEIGHT OF SAID MASS OF UREA, AND RECOVERING THE THUS PRODUCED BIURET FROM THE RESULTING REACTION MASS.
References Cited (Backward Citations)
US2089697A
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US2145392A
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US2338987A
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US2281599A
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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) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |