Patent US2806062A successfully refreshed from Google Patents.
US2806062A
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Process for the manufacture of diphenylurea
Assignee: Individual
•
Filing: 1937-06-19
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Granted: 1957-09-10
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Expires: 1957-06-19
Abstract
No abstract record available.
Inventors
- 👤 Gehauf Bernard
- 👤 Arsenal Edgewood
- 👤 Edgar M Faber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:31
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/18; C07C273/1809
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
THE PROCESS OF MAKING DIPHENYLUREA COMPRISING MAKING AN AQUEOUS MIXTURE OF ANILINE AND SODA ASH IN THE RATIO OF ABOUT 465 PARTS BY WEIGHT OF ANILINE AND ABOUT 380 PARTS BY WEIGHT OF SODA ASH IN ABOUT 2500 PARTS BY WEIGHT OF WATER, AGITATING SAID AQUEOUS MIXTURE WHILE INTRODUCING THEREINTO ABOUT 270 PARTS BY WEIGHT OF PHOSGENE CONTINUING THE AGITATION AND MAINTAINING THE TEMPERATURE OF THE REACTION MIXTURE WITHIN THE RANGE OF FROM ABOUT 35*C. TO ABOUT 40*C. UNTIL THE PHOSGENATION IS COMPLETED.
Claim 2
Dependent Claim
83 words
THE PROCESS OF MAKING DIPHENYLUREA COMPRISING MAKING AN AQUEOUS MIXTURE OF ANILINE AND SODA ASH IN THE RATIO OF ABOUT 465 PARTS BY WEIGHT OF ANILINE AND ABOUT 380 PARTS BY WEIGHT OF SODA ASH IN ABOUT 2500 PARTS BY WEIGHT OF WATER, AGITATING SAID AQUEOUS MIXTURE WHILE INTRODUCING THEREINTO ABOUT 270 PARTS BY WEIGHT OF PHOSGENE CONTINUING THE AGITATION AND MAINTAINING THE TEMPERATURE OF THE REACTION MIXTURE WITHIN THE RANGE OF FROM ABOUT 35*C. TO ABOUT 40*C. UNTIL THE PHOSGENATION IS COMPLETED.
References Cited (Backward Citations)
US1393597A
Cited
US2044355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |