Patent US3142535A successfully refreshed from Google Patents.
US3142535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the purification of hydrogen chloride gas contaminated with phosgene
Assignee: EIDP Inc
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Filing: 1962-08-16
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Granted: 1964-07-28
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Expires: 1982-08-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank J Christoph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:23
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROCESS FOR REMOVING PHOSGENE FROM A GASEOUS MIXTURE COMPRISED OF HYDROGEN CHLORIDE AND PHOSGENE, WHICH COMPRISES INTIMATELY CONTACTING AT A TEMPERATURE OF FROM ABOUT 0 TO 100*C. SAID GASEOUS MIXTURE WITH A LIQUID ALCOHOL SELECTED FROM THE GROUPS CONSISTING OF ALIPHATIC PRIMARY AND SECONDARY ALCOHOLS, THE AMOUNT OF ALCOHOL BEING SUFFICIENT TO SUPPLY AT LEAST 1.05 EQUIVALENT OF HYDROXYL GROUPS FOR EACH MOLE OF PHOSGENE.
Claim 2
Dependent Claim
66 words
A PROCESS FOR REMOVING PHOSGENE FROM A GASEOUS MIXTURE COMPRISED OF HYDROGEN CHLORIDE AND PHOSGENE, WHICH COMPRISES INTIMATELY CONTACTING AT A TEMPERATURE OF FROM ABOUT 0 TO 100*C. SAID GASEOUS MIXTURE WITH A LIQUID ALCOHOL SELECTED FROM THE GROUPS CONSISTING OF ALIPHATIC PRIMARY AND SECONDARY ALCOHOLS, THE AMOUNT OF ALCOHOL BEING SUFFICIENT TO SUPPLY AT LEAST 1.05 EQUIVALENT OF HYDROXYL GROUPS FOR EACH MOLE OF PHOSGENE.
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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |