US3154141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roughened heat exchanger tube
Assignee: Individual
•
Filing: 1960-04-26
•
Granted: 1964-10-27
•
Expires: 1980-04-26
Abstract
No abstract record available.
Inventors
- 👤 Huet Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:48
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/18; F28F13/185; F28F1/00; F28F1/10; F28F1/12; F28F1/124; G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/06; G21C3/08; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A HEAT-EXCHANGER TUBE DEFINED BY A TUBE WALL HAVING AN OUTER SURFACE PROVIDED WITH INTEGRAL ROUGH, DISCONTINOUS EXCRESCENCES IN RELIEF DISPOSED SPACED FROM EACH OTHER AXIALLY AND CIRCUMFERENTIALLY ON SAID TUBE, SAID EXCRESCENCES BEING LIMITED IN AXIAL AND CIRCUMFERENTIAL EXTENT SO THAT A PLURALITY ARE ACCOMMODATED CIRCUMFERENTIALLY OF SAID TUBE AND AXIALLY OF SAID TUBE, SAID EXCRESCENCES EACH HAVING A HEIGHT OF ABOUT 1/10 OF A MILLIMETER TO ABOUT ONE MILLIMETER WITH RESPECT TO THE SURFACE OF SAID TUBE, SAID EXCRESCENCES VARYING IN HEIGHT OVER THE LENGTH OF SAID TUBE, AND SAID EXCRESCENCES BEING FORMED WHOLLY FROM THE MATERIAL OF SAID TUBE WALL.
Claim 2
Dependent Claim
103 words
A HEAT-EXCHANGER TUBE DEFINED BY A TUBE WALL HAVING AN OUTER SURFACE PROVIDED WITH INTEGRAL ROUGH, DISCONTINOUS EXCRESCENCES IN RELIEF DISPOSED SPACED FROM EACH OTHER AXIALLY AND CIRCUMFERENTIALLY ON SAID TUBE, SAID EXCRESCENCES BEING LIMITED IN AXIAL AND CIRCUMFERENTIAL EXTENT SO THAT A PLURALITY ARE ACCOMMODATED CIRCUMFERENTIALLY OF SAID TUBE AND AXIALLY OF SAID TUBE, SAID EXCRESCENCES EACH HAVING A HEIGHT OF ABOUT 1/10 OF A MILLIMETER TO ABOUT ONE MILLIMETER WITH RESPECT TO THE SURFACE OF SAID TUBE, SAID EXCRESCENCES VARYING IN HEIGHT OVER THE LENGTH OF SAID TUBE, AND SAID EXCRESCENCES BEING FORMED WHOLLY FROM THE MATERIAL OF SAID TUBE WALL.
References Cited (Backward Citations)
US11409A
Cited
US2343542A
Cited
US1821434A
Cited
US1878242A
Cited
US1826344A
Cited
US1992297A
Cited
US2252045A
Cited
US2316273A
Cited
US2519820A
Cited
US2578136A
Cited
US2549466A
Cited
GB656616A
Cited
GB684602A
Cited
US2902422A
Cited
US2825962A
Cited
US2804286A
Cited
US2974404A
Cited
US3007237A
Cited
FR2343542A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |