Patent US2773898A successfully refreshed from Google Patents.
US2773898A
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Process for drying phosgene
Assignee: Bayer AG
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Filing: 1954-01-22
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Granted: 1956-12-11
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Expires: 1974-01-22
Abstract
No abstract record available.
Inventors
- 👤 Brinkmann Georg
- 👤 Heinz H Wollthan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:39
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; C; C01; C01B; C01B32/00; C01B32/70; C01B32/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
PROCESS FOR DRYING PHOSGENE, WHICH COMPRISES PASSING A STREAM OF PHOSGENE INTO, THROUGH, AND OUT OF A DRYING ZONE, WHILE CONTACTING THE PHOSGENE WITH CHARCOAL IN SAID DRYING ZONE, THE STREAM OF PHOSGENE ENTERING SAID DRYING ZONE CONTAINING WATER VAPOR WHICH REACTS WITH AN EQUIVALENT AMOUNT OF PHOSGENE IN SAID ZONE IN THE PRESENCE OF SAID CHARCOAL, WHEREBY THE STREAM OF PHOSGENE PASSING OUT OF SAID ZONE IS DRIED.
Claim 2
Dependent Claim
69 words
PROCESS FOR DRYING PHOSGENE, WHICH COMPRISES PASSING A STREAM OF PHOSGENE INTO, THROUGH, AND OUT OF A DRYING ZONE, WHILE CONTACTING THE PHOSGENE WITH CHARCOAL IN SAID DRYING ZONE, THE STREAM OF PHOSGENE ENTERING SAID DRYING ZONE CONTAINING WATER VAPOR WHICH REACTS WITH AN EQUIVALENT AMOUNT OF PHOSGENE IN SAID ZONE IN THE PRESENCE OF SAID CHARCOAL, WHEREBY THE STREAM OF PHOSGENE PASSING OUT OF SAID ZONE IS DRIED.
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) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |