US2936322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of bis (2, 4, 6-trichlorophenyl) urea
Assignee: Individual
•
Filing: 1933-01-18
•
Granted: 1960-05-10
•
Expires: 1953-01-18
Abstract
No abstract record available.
Inventors
- 👤 Pfanstiel Robert
- 👤 Frederick M Pralatowski
- 👤 Herbert A Scruton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:45
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/18; C07C273/1809; D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/432
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A PROCESS OF MAKING SYM. BIS (2,4,6 TRICHLORPHENYL) UREA, THE STEPS COMPRISING DISSOLVING 2,4,6 TRICHLOR ANILINE IN A SOLVENT OF THE GROUP CONSISTING OF NITRO BENZENE, O-NITROTOLUENE, MONOCHLOROBENZENE, AND MIXTURES OF TOLUENE AND PYRIDIEN, AND PASSING A CURRENT OF PHOSGENE GAS THROUGH THE SOLUTION THUS FORMED WHILE MAINTAINING SAID SOLUTION AT A TEMPERATURE OF FROM ABOUT 110*C. TO ABOUT 120*C.
Claim 2
Dependent Claim
61 words
IN A PROCESS OF MAKING SYM. BIS (2,4,6 TRICHLORPHENYL) UREA, THE STEPS COMPRISING DISSOLVING 2,4,6 TRICHLOR ANILINE IN A SOLVENT OF THE GROUP CONSISTING OF NITRO BENZENE, O-NITROTOLUENE, MONOCHLOROBENZENE, AND MIXTURES OF TOLUENE AND PYRIDIEN, AND PASSING A CURRENT OF PHOSGENE GAS THROUGH THE SOLUTION THUS FORMED WHILE MAINTAINING SAID SOLUTION AT A TEMPERATURE OF FROM ABOUT 110*C. TO ABOUT 120*C.
References Cited (Backward Citations)
DE318237C
Cited
US1477087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |