Patent US3249147A successfully refreshed from Google Patents.
US3249147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film evaporators
Assignee: Burnett and Rolfe Ltd
•
Filing: 1963-06-14
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Granted: 1966-05-03
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Expires: 1983-06-14
Abstract
No abstract record available.
Inventors
- 👤 Gull Herbert Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:51
CPC Classifications
A; A23; A23C; A23C1/00; A23C1/12; A23B; A23B11/00; A23B11/10; A23B11/12; A23B11/13; A23B11/133; A23B2/00; A23B2/40; A23B2/42; A23B2/46; B; B01; B01D; B01D1/00; B01D1/0082; B01D1/04; B01D1/22; B01D1/28; B01D1/2896; Y; Y10; Y10S; Y10S159/00; Y10S159/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
AN EVAPORATOR FOR EVAPORATING SOLUTIONS OF SOLIDS IN LIQUIDS, INCLUDING IN COMBINATION AN IMPROVED CALANDRIA WHICH COMPRISES A PLURALITY OF SUBSTANTIALLY HORIZONTAL EVAPORATIR TUBES, EACH OF SAID TUBES BEING BETWEEN ABOUT 3/4 INCH AND ABOUT 1 3/8 INCHES IN INTERNAL DIAMETER AND BETWEEN ABOUT 8 FEET AND ABOUT 16 FEET IN LENGTH, AND MEANS MOUNTING SAID TUBES PARALLEL TO EACH OTHER, MEANS FOR HEATING THE EXTERIOR SURFACES OF SAID TUBES TO A TEMPERATURE NO MORE THAN 20 * F. ABOVE THAT OF THE INTERIOR SURFACES OF SAID TUBES AND COMPRIISNG A SHELL SURROUNDING SAID TUBES AND FORMING A STEAM JACKET, MEANS FOR SUPPLYING SOLUTION TO SAID TUBES AT A RATE NO MORE THAN THREE TIMES THE EVAPORATION RATE THEREIN, AN INLET CHAMBER FOR RECEIVING THE SOLUTION THUS SUPPLIED, A PLATE SEPARATING SAID INLET CHAMBER FROM SAID TUBES, SAID PLATE BEING PIERCED BY A PLURALITY OF BORES, EACH FOR DIRECTING A STREAM OF SAID LIQUID FROM SAID CHAMBER INTO AN END OF ONE OF SAID TUBES, THE AXIS OF SAID BORES BEING INCLINED TO THOSE OF SAID TUBES WHEREBY LIQUID ISSUING
Claim 2
Dependent Claim
180 words
AN EVAPORATOR FOR EVAPORATING SOLUTIONS OF SOLIDS IN LIQUIDS, INCLUDING IN COMBINATION AN IMPROVED CALANDRIA WHICH COMPRISES A PLURALITY OF SUBSTANTIALLY HORIZONTAL EVAPORATIR TUBES, EACH OF SAID TUBES BEING BETWEEN ABOUT 3/4 INCH AND ABOUT 1 3/8 INCHES IN INTERNAL DIAMETER AND BETWEEN ABOUT 8 FEET AND ABOUT 16 FEET IN LENGTH, AND MEANS MOUNTING SAID TUBES PARALLEL TO EACH OTHER, MEANS FOR HEATING THE EXTERIOR SURFACES OF SAID TUBES TO A TEMPERATURE NO MORE THAN 20 * F. ABOVE THAT OF THE INTERIOR SURFACES OF SAID TUBES AND COMPRIISNG A SHELL SURROUNDING SAID TUBES AND FORMING A STEAM JACKET, MEANS FOR SUPPLYING SOLUTION TO SAID TUBES AT A RATE NO MORE THAN THREE TIMES THE EVAPORATION RATE THEREIN, AN INLET CHAMBER FOR RECEIVING THE SOLUTION THUS SUPPLIED, A PLATE SEPARATING SAID INLET CHAMBER FROM SAID TUBES, SAID PLATE BEING PIERCED BY A PLURALITY OF BORES, EACH FOR DIRECTING A STREAM OF SAID LIQUID FROM SAID CHAMBER INTO AN END OF ONE OF SAID TUBES, THE AXIS OF SAID BORES BEING INCLINED TO THOSE OF SAID TUBES WHEREBY LIQUID ISSUING
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |