Patent US2908705A successfully refreshed from Google Patents.
US2908705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of hydroxyaryl thioisocyanates
Assignee: Bayer AG
•
Filing: 1957-02-26
•
Granted: 1959-10-13
•
Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Nischk Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:23
CPC Classifications
C; C07; C07C; C07C331/00; C07C331/16; C07C331/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN THE PROCESS FOR THE PREPARATION OF HYDOXYARYL ISOTHIOCYANATES BY REACTING HYDROXYARYL DITHIOCARBAMATES WITH PHOSGENE THE IMPROVEMENT WHERIN PHOSGENE IS REACTED WITH AN AQUEOUS SOLUTION OF AN AROMATIC COMPOUND HAVING AT LEAST ONE DITHIOCARBAMATE GROUP AND AT LEAST ONE HYDROXY GROUP SELECTED FROM THE GROUP CONSISTING OF PHENOLIC AND BENZYL HYDROXY GROUPS, THE PHENOLIC HYDROXY GROUP BEING IN A POSITION OTHER THAN ORTHO TO AN AMINO GROUP, THE TEMPERATURE AT THE BEGINNING OF THE REACTION BEING IN THE RANGE OF APPROXIMATELY 5-20*C.
Claim 2
Dependent Claim
82 words
IN THE PROCESS FOR THE PREPARATION OF HYDOXYARYL ISOTHIOCYANATES BY REACTING HYDROXYARYL DITHIOCARBAMATES WITH PHOSGENE THE IMPROVEMENT WHERIN PHOSGENE IS REACTED WITH AN AQUEOUS SOLUTION OF AN AROMATIC COMPOUND HAVING AT LEAST ONE DITHIOCARBAMATE GROUP AND AT LEAST ONE HYDROXY GROUP SELECTED FROM THE GROUP CONSISTING OF PHENOLIC AND BENZYL HYDROXY GROUPS, THE PHENOLIC HYDROXY GROUP BEING IN A POSITION OTHER THAN ORTHO TO AN AMINO GROUP, THE TEMPERATURE AT THE BEGINNING OF THE REACTION BEING IN THE RANGE OF APPROXIMATELY 5-20*C.
References Cited (Backward Citations)
GB678125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |