Patent US3175962A successfully refreshed from Google Patents.
US3175962A
Expired / Lapsed
US
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Falling film evaporator
Assignee: General Electric Co
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Filing: 1961-02-28
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Granted: 1965-03-30
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Expires: 1981-02-28
Abstract
No abstract record available.
Inventors
- 👤 David J Holtslag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:48
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/18; B; B01; B01D; B01D1/00; B01D1/06; B01D1/065; B01D1/12; B01D1/22; B01D1/26; B01D1/28; B01D1/2803; B01D1/2806; B01D1/2881; C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/045; C02F1/08; C02F1/16; F28D; F28D3/00; F28D3/02; Y; Y10; Y10S; Y10S203/00; Y10S203/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN A DISTILLATION APPARATUS, THE COMBINATION OF A STATIONARY HEAT EXCHANGE WALL MEMBER DEFINING AN EVAPORATING SURFACE OPPOSITE A CONDENSING SURFACE, SAID HEAT EXCHANGE WALL MEMBER DEFINING A LONGITUDINAL TAPERED PASSAGE MEANS OF GRADUALLY INCREASING CROSS-SECTIONAL AREA IN THE DIRECTION OF FLOWING DISTILLAND, MEANS FOR FLOWING DISTILLAND OVER THE EVAPORATING SURFACE AS A THIN FILM, MEANS FOR PASSING A CONDENSIBLE HEAT EXCHANGE MEDIUM IN CONTACT WITH THE CONDENSING SURFACE OF THE HEAT EXCHANGE WALL MEMBER TO CONDENSE HEAT EXCHANGE MEDIUM ON THE CONDENSING SURFACE THEREBY PLACING THE HEAT EXCHANGE MEDIUM IN HEAT TRANSFER RELATION WITH THE DISTILLAND ON THE EVAPORATING SURFACE TO EVAPORATE A SUBSTANTIAL PORTION OF DISTILLAND FILM, AND MEANS FOR RECIRCULATING A PORTION OF THE VAPOR FORMED FROM THE DISTILLAND FILM TO PASS THE VAPOR OVER THE EVAPORATING SURFACE TO MAINTAIN A DESIRED LEVEL OF TURBULENCE IN THE DISTILLAND FILM FLOWING OVER THE EVAPORATING SURFACE.
Claim 2
Dependent Claim
147 words
IN A DISTILLATION APPARATUS, THE COMBINATION OF A STATIONARY HEAT EXCHANGE WALL MEMBER DEFINING AN EVAPORATING SURFACE OPPOSITE A CONDENSING SURFACE, SAID HEAT EXCHANGE WALL MEMBER DEFINING A LONGITUDINAL TAPERED PASSAGE MEANS OF GRADUALLY INCREASING CROSS-SECTIONAL AREA IN THE DIRECTION OF FLOWING DISTILLAND, MEANS FOR FLOWING DISTILLAND OVER THE EVAPORATING SURFACE AS A THIN FILM, MEANS FOR PASSING A CONDENSIBLE HEAT EXCHANGE MEDIUM IN CONTACT WITH THE CONDENSING SURFACE OF THE HEAT EXCHANGE WALL MEMBER TO CONDENSE HEAT EXCHANGE MEDIUM ON THE CONDENSING SURFACE THEREBY PLACING THE HEAT EXCHANGE MEDIUM IN HEAT TRANSFER RELATION WITH THE DISTILLAND ON THE EVAPORATING SURFACE TO EVAPORATE A SUBSTANTIAL PORTION OF DISTILLAND FILM, AND MEANS FOR RECIRCULATING A PORTION OF THE VAPOR FORMED FROM THE DISTILLAND FILM TO PASS THE VAPOR OVER THE EVAPORATING SURFACE TO MAINTAIN A DESIRED LEVEL OF TURBULENCE IN THE DISTILLAND FILM FLOWING OVER THE EVAPORATING SURFACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |