Patent US3636104A successfully refreshed from Google Patents.
US3636104A
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Process for preparing n n'-diarylthioureas
Assignee: Olin Corp
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Filing: 1968-10-29
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Granted: 1972-01-18
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Expires: 1988-10-29
Abstract
Abstract THE PROCESS FOR PREPARING N,N''-DIARYLTHIOUREAS BY REACTING: (A) CARBON DISULFIDE AND/OR CARBONYL SULFIDE, (B) WATER, (C) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) AN AROMATIC NITRO COMPOUND, (2) AN AROMATIC NITROSO COMPOUND, (3) AND MIXTURES OF (1) AND (2), (D) AND A BASE, AND RECOVERING THE N,N''-DIARYLTHIOUREAS PRODUCED THEREBY.
Inventors
- 👤 Ehrenfried H Kober
- 👤 Gerhard F Ottmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:54
CPC Classifications
C; C07; C07C; C07C335/00; C07C335/04; C07C335/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |