US3269459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extensive surface heat exchanger
Assignee: Individual
•
Filing: 1963-03-12
•
Granted: 1966-08-30
•
Expires: 1983-03-12
Abstract
No abstract record available.
Inventors
- 👤 Popovitch Dragolyoub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:20
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/08; F28D7/082; F28D7/085; F28D7/0041; F28D7/10; F28D7/106; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F1/22; F28F21/00; F28F21/08; F28F21/081; F28F21/082; F28F21/084; F28F21/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
AN EXTENSIVE SURFACE HEAT EXCHANGER COMPRISING IN COMBINATION A PLURALITY OF SMALL DIAMETER CONTIGUOUS TUBES DISPOSED IN SPACED-APART ALINED ROWS TO CONVEY HIGH PRESSURE GASEOUS FLOW; MEANS SANDWICHING THE TUBES IN EACH ROW TO PROVIDE SUBSTANTIALLY FLAT SURFACES ON OPPOSITE SIDES THEREOF; A PLURALITY OF RADIATING FINS AFFIXED IN SPACEDAPART RELATION ON EACH OF THE SURFACES AND EXTENDING LENGTHWISE OF THE TUBES TO GUIDE LOW PRESSURE GASEOUS FLOW AND TO PROVIDE EXTENSIVE HEAT EXCHANGE SURFACES; AND MEANS FOR INTRODUCING LOW PRESSURE GASEOUS FLOW BETWEEN THE SPACED FINS FOR FLOW THEREALONG TO EFFECT HEAT TRANSFER WITH THE FIRST-MENTIONED FLOW; SAID TUBES BEING CAPABLE OF CONVEYING HIGH PRESSURE GASEOUS FLOW WITHOUT RUPTURE AND SAID FINS GUIDING SAID LOW PRESSURE GASEOUS FLOW IN SUBSTANTIALLY TURBULENCE-FREE MANNER.
Claim 2
Dependent Claim
123 words
AN EXTENSIVE SURFACE HEAT EXCHANGER COMPRISING IN COMBINATION A PLURALITY OF SMALL DIAMETER CONTIGUOUS TUBES DISPOSED IN SPACED-APART ALINED ROWS TO CONVEY HIGH PRESSURE GASEOUS FLOW; MEANS SANDWICHING THE TUBES IN EACH ROW TO PROVIDE SUBSTANTIALLY FLAT SURFACES ON OPPOSITE SIDES THEREOF; A PLURALITY OF RADIATING FINS AFFIXED IN SPACEDAPART RELATION ON EACH OF THE SURFACES AND EXTENDING LENGTHWISE OF THE TUBES TO GUIDE LOW PRESSURE GASEOUS FLOW AND TO PROVIDE EXTENSIVE HEAT EXCHANGE SURFACES; AND MEANS FOR INTRODUCING LOW PRESSURE GASEOUS FLOW BETWEEN THE SPACED FINS FOR FLOW THEREALONG TO EFFECT HEAT TRANSFER WITH THE FIRST-MENTIONED FLOW; SAID TUBES BEING CAPABLE OF CONVEYING HIGH PRESSURE GASEOUS FLOW WITHOUT RUPTURE AND SAID FINS GUIDING SAID LOW PRESSURE GASEOUS FLOW IN SUBSTANTIALLY TURBULENCE-FREE MANNER.
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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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |