US3000988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of gas
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1959-10-07
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Granted: 1961-09-19
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Expires: 1979-10-07
Abstract
No abstract record available.
Inventors
- 👤 Jean H Karchmer
- 👤 Marjorie W Eastwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:43
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/20; C07; C07C; C07C7/00; C07C7/148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD FOR PURIFYING AN OLEFINIC GAS CONTAINING CARBONYL SULFIDE WHICH COMPRISES CONTACTING SAID GAS WITH SODA-LIME CONTAINING FROM ABOUT 90% TO ABOUT 99.5% BY WEIGHT OF HYDRATED LIME AND FROM ABOUT 0.5% TO ABOUT 10% BY WEIGHT OF SODIUM HYDROXIDE, THE HYDRATED LIME CONTAINING FROM ABOUT 0.1% TO ABOUT 5.0% BY WEIGHT WATER.
Claim 2
Independent Claim
54 words
A METHOD FOR PURIFYING AN OLEFINIC GAS CONTAINING CARBONYL SULFIDE WHICH COMPRISES CONTACTING SAID GAS WITH SODA-LIME CONTAINING FROM ABOUT 90% TO ABOUT 99.5% BY WEIGHT OF HYDRATED LIME AND FROM ABOUT 0.5% TO ABOUT 10% BY WEIGHT OF SODIUM HYDROXIDE, THE HYDRATED LIME CONTAINING FROM ABOUT 0.1% TO ABOUT 5.0% BY WEIGHT WATER.
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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |