Patent US2992897A successfully refreshed from Google Patents.
US2992897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of carbonyl sulfide
Assignee: Monsanto Chemicals Ltd
•
Filing: 1959-01-02
•
Granted: 1961-07-18
•
Expires: 1979-01-02
Abstract
No abstract record available.
Inventors
- 👤 Applegath Fred
- 👤 Raymond A Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:34
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS FOR PREPARING CARBONYL SULFIDE WHICH COMPRISES REACTING CARBON MONOXIDE AND SULFUR IN AN ALIPHATIC ALCOHOL HAVING DISPERSED THEREIN A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND ALKALINE EARTH METAL SULFIDES AND BISULFIDES AT A TEMPERATURE RANGING FROM ABOUT 25*C. TO ABOUT 300%C.
Claim 2
Dependent Claim
47 words
A PROCESS FOR PREPARING CARBONYL SULFIDE WHICH COMPRISES REACTING CARBON MONOXIDE AND SULFUR IN AN ALIPHATIC ALCOHOL HAVING DISPERSED THEREIN A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND ALKALINE EARTH METAL SULFIDES AND BISULFIDES AT A TEMPERATURE RANGING FROM ABOUT 25*C. TO ABOUT 300%C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |