US2805734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preventing frost from forming in coolers for the condensation of volatile substances from moist carrier gases
Assignee: Bayer AG
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Filing: 1954-11-30
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Granted: 1957-09-10
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Expires: 1974-11-30
Abstract
No abstract record available.
Inventors
- 👤 Riess Kurt
- 👤 Haltmeier Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:54
CPC Classifications
F; F26; F26B; F26B25/00; F26B25/005; F26B25/006; D; D01; D01D; D01D5/00; D01D5/04; F25; F25B; F25B47/00; F25B47/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A PROCESS IN WHICH A VOLATILE SUBSTANCE IN CONDENSED FROM A MOIST CARRIER GAS ON A COOLING SURFACE, THE IMPROVEMENT FOR PREVENTING FROST FROM FORMING ON SAID COOLING SURFACE WHICH COMPRISES PASSING AN AQUEOUS LIQUID WITH A LOWER VAPOR PRESSURE THAN WATER IN COUNTERCURRENT CONTACT WITH THE GAS MIXTURE BEING PASSED TO AND LEAVING THE COOLING SURFACE, SAID AQUEOUS LIQUID BEING PASSED IN CONTACT WITH THE GAS MIXTURE BEING PASSED TO THE COOLING SURFACES HAVING A TEMPERATURE SUFFICIENTLY LOW TO REDUCE THE DEW POINT OF THE GAS MIXTURE TO AT LEAST AS LOW AS THE TEMPERATURE OF THE COOLING SURFACES WITHOUT CONDENSING ANY OF THE VOLATILE SUBSTANCES CONTAINED THEREIN.
Claim 2
Dependent Claim
110 words
IN A PROCESS IN WHICH A VOLATILE SUBSTANCE IN CONDENSED FROM A MOIST CARRIER GAS ON A COOLING SURFACE, THE IMPROVEMENT FOR PREVENTING FROST FROM FORMING ON SAID COOLING SURFACE WHICH COMPRISES PASSING AN AQUEOUS LIQUID WITH A LOWER VAPOR PRESSURE THAN WATER IN COUNTERCURRENT CONTACT WITH THE GAS MIXTURE BEING PASSED TO AND LEAVING THE COOLING SURFACE, SAID AQUEOUS LIQUID BEING PASSED IN CONTACT WITH THE GAS MIXTURE BEING PASSED TO THE COOLING SURFACES HAVING A TEMPERATURE SUFFICIENTLY LOW TO REDUCE THE DEW POINT OF THE GAS MIXTURE TO AT LEAST AS LOW AS THE TEMPERATURE OF THE COOLING SURFACES WITHOUT CONDENSING ANY OF THE VOLATILE SUBSTANCES CONTAINED THEREIN.
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) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |