US3360040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger elements
Assignee: Peerless of America Inc
•
Filing: 1965-07-30
•
Granted: 1967-12-26
•
Expires: 1985-07-30
Abstract
No abstract record available.
Inventors
- 👤 Richard W Kritzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:12
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F1/16; B; B21; B21J; B21J5/00; B21J5/06; B21J5/068; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A HEAT TRANSFER ELEMENT COMPRISING (A) AN ELONGATED TUBULAR MEMBER, AND (B) A PLURALITY OF FINS PROJECTING OUTWARDLY FROM SAID TUBULAR MEMBER AND EXTENDING LONGITUDINALLY THEREOF, (C) EACH OF SAID FINS COMPRISING (1) A BASE PORTION PROJECTING RADIALLY OUTWARDLY FROM SAID TUBULAR MEMBER, AND (2) A PLURALITY OF PAIRS OF ELONGATED SPINES PROJECTING LONGITUDINALLY OUTWARDLY FROM SAID BASE PORTION, WITH THE FINS IN EACH PAIR PROJECTING AT AN OPPOSITELY OPENING ACUTE ANGLE TO THE RADIUS ALONG WHICH SAID BASE PORTION PROJECTS, (D) ADJACENT ONES OF SAID SPINES IN EACH OF SAID FINS BEING DISPOSED ALTERNATELY AT SAID OPPOSITELY OPENING ANGLES, AND
Claim 2
Dependent Claim
101 words
A HEAT TRANSFER ELEMENT COMPRISING (A) AN ELONGATED TUBULAR MEMBER, AND (B) A PLURALITY OF FINS PROJECTING OUTWARDLY FROM SAID TUBULAR MEMBER AND EXTENDING LONGITUDINALLY THEREOF, (C) EACH OF SAID FINS COMPRISING (1) A BASE PORTION PROJECTING RADIALLY OUTWARDLY FROM SAID TUBULAR MEMBER, AND (2) A PLURALITY OF PAIRS OF ELONGATED SPINES PROJECTING LONGITUDINALLY OUTWARDLY FROM SAID BASE PORTION, WITH THE FINS IN EACH PAIR PROJECTING AT AN OPPOSITELY OPENING ACUTE ANGLE TO THE RADIUS ALONG WHICH SAID BASE PORTION PROJECTS, (D) ADJACENT ONES OF SAID SPINES IN EACH OF SAID FINS BEING DISPOSED ALTERNATELY AT SAID OPPOSITELY OPENING ANGLES, AND
References Cited (Backward Citations)
FR358640A
Cited
US1929444A
Cited
US2765152A
Cited
US2775431A
Cited
US3205560A
Cited
GB837213A
Cited
US3294162A
Cited
US3229722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |