US2914527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonium compounds
Assignee: —
•
Filing: —
•
Granted: 1959-11-24
•
Expires: 1976-11-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:49
CPC Classifications
C; C07; C07D; C07D279/00; C07D279/10; C07D279/14; C07D279/18; C07D279/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A SULFONIUM SALT OF THE FORMULA
Claim 2
Dependent Claim
6 words
A SULFONIUM SALT OF THE FORMULA
Claim 3
Dependent Claim
101 words
THE PROCESS WHICH COMPRISES HEATING AT REFLUX IN A MIXTURE OF NITROMETHANE AND ETHANOL AN (10-PHENOTHIAZINYL) ALKYL HALIDE AND THIOUREAM THEREBY FORMING AN S-(W-(10-PHENOTHIAZINYL) ALKYL) PSEUDOTHIOREA HYDRO HALIDE; REFLUXING SAID LATTER COMPOUND WITH AN AQUEOUS ALCOHOLIC ALKALI METAL CARBONATE, THEREBY FORMING AN W-(10-PHENOTHIAZINYL)ALKYL MERCAPTAN; ADDING SAID MERCAPTAN TO AN ALCOHOLIC SOLUTION OF AN ALKYL HALIDE IN THE PRESENCE OF AN ALKALINE CONDENSING AGENT AND HEATING AT REFLUX, THEREBY FORMING AN W-(10-PHENOTHIAZINYL) ALKYL ALKYLSUFLFIDE; AND ADDING AN ALKYL HALIDE TO SAID LATTER COMPOUND AND PERMITTING THE RESULTING MIXTURE TO STAND AT ROOM TEMPERATURE IN THE DARK, THEREBY FORMING AN W-(10-PHENOTHIAZINYL)ALKYL DIALKYLSULFONIUM SALT.
Claim 4
Dependent Claim
101 words
THE PROCESS WHICH COMPRISES HEATING AT REFLUX IN A MIXTURE OF NITROMETHANE AND ETHANOL AN (10-PHENOTHIAZINYL) ALKYL HALIDE AND THIOUREAM THEREBY FORMING AN S-(W-(10-PHENOTHIAZINYL) ALKYL) PSEUDOTHIOREA HYDRO HALIDE; REFLUXING SAID LATTER COMPOUND WITH AN AQUEOUS ALCOHOLIC ALKALI METAL CARBONATE, THEREBY FORMING AN W-(10-PHENOTHIAZINYL)ALKYL MERCAPTAN; ADDING SAID MERCAPTAN TO AN ALCOHOLIC SOLUTION OF AN ALKYL HALIDE IN THE PRESENCE OF AN ALKALINE CONDENSING AGENT AND HEATING AT REFLUX, THEREBY FORMING AN W-(10-PHENOTHIAZINYL) ALKYL ALKYLSUFLFIDE; AND ADDING AN ALKYL HALIDE TO SAID LATTER COMPOUND AND PERMITTING THE RESULTING MIXTURE TO STAND AT ROOM TEMPERATURE IN THE DARK, THEREBY FORMING AN W-(10-PHENOTHIAZINYL)ALKYL DIALKYLSULFONIUM SALT.
References Cited (Backward Citations)
US2738349A
Cited
US2659724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |