US3285334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral dual-passage heat exchange tubing with reverse bends
Assignee: Peerless of America Inc
•
Filing: 1965-08-05
•
Granted: 1966-11-15
•
Expires: 1985-08-05
Abstract
No abstract record available.
Inventors
- 👤 Stephen F Pasternak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:35
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/26; F28D; F28D7/00; F28D7/0008; F28D7/0016; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F1/22; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/495
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A HEAT EXCHANGE UNIT OF THE CHARACTER DESCRIBED, AN ELONGATED STRIP OF DUAL-PASSAGE HEAT EXCHANGE TUBING INCLUDING A PAIR OF CLOSELY PARALLEL TUBES INTEGRALLY CONNECTED TOGETHER BY A NARROW WEB WHICH EXTENDS RADIALLY OF EACH TUBE AND WHICH LIES IN THE GENERAL PLANE OIF THE TUBE AXES, SAID STRIP OF TUBING INCLUDING PARALLEL REACH SECTIONS CONNECTED TOGETHER BY REVERSE BENDS, THE TUBES OF SAID REACH SECTIONS HAVING THEIR AXES EXTENDING IN COPLANAR RELATIONSHIP, THE WEB IN AT LEAST ONE OF SAID REVERSE BENDS BEING RUPTURED THROUGHOUT SUBSTANTIALLY THE ENTIRE EXTENT OF THE BEND AND THE PORTIONS OF THE TUBES EMBODIES BY SAID BEND LATERALLY DISPLACED FROM EACH OTHER WITH RESPECT TO SAID GENERAL PLANE OF THE TUBE AXES.
Claim 2
Dependent Claim
119 words
IN A HEAT EXCHANGE UNIT OF THE CHARACTER DESCRIBED, AN ELONGATED STRIP OF DUAL-PASSAGE HEAT EXCHANGE TUBING INCLUDING A PAIR OF CLOSELY PARALLEL TUBES INTEGRALLY CONNECTED TOGETHER BY A NARROW WEB WHICH EXTENDS RADIALLY OF EACH TUBE AND WHICH LIES IN THE GENERAL PLANE OIF THE TUBE AXES, SAID STRIP OF TUBING INCLUDING PARALLEL REACH SECTIONS CONNECTED TOGETHER BY REVERSE BENDS, THE TUBES OF SAID REACH SECTIONS HAVING THEIR AXES EXTENDING IN COPLANAR RELATIONSHIP, THE WEB IN AT LEAST ONE OF SAID REVERSE BENDS BEING RUPTURED THROUGHOUT SUBSTANTIALLY THE ENTIRE EXTENT OF THE BEND AND THE PORTIONS OF THE TUBES EMBODIES BY SAID BEND LATERALLY DISPLACED FROM EACH OTHER WITH RESPECT TO SAID GENERAL PLANE OF THE TUBE AXES.
References Cited (Backward Citations)
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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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |