US3273637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: —
•
Filing: —
•
Granted: 1966-09-20
•
Expires: 1983-09-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:52
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21D53/045; F; F25; F25B; F25B2339/00; F25B2339/04; F25B2339/043; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19679
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A HOLLOW SHEET METAL PLATE HAVING EXTENDING ENTERNALLY THEREIN A SYSTEM OF FLUID PASSAGES WITH SAID PASSAGES COMPRISING SPACED PARALLEL FLUID PASSAGEWAYS EXTENDING LONGITUDINALLY IN SAID PLATE AND ALSO DIDTENDED OUT OF THE PLANE OF SAID PLATE WITH THE DISTENTION OF SAID PASSAGEWAYS IN A CROSS-SECTION THEREOF NORMAL TO SAID PLANE EXTENDING OUT OF SAID PLANE IN AN AMOUNT GREATER THAN THE WIDTH OF SAID PASSAGEWAYS IN SAID CROSS-SECTION ARE ENLONGATED SAID PASSAGEWAYS IN SAID CROSS-SECTION ARE ENLONGATED TO HAVE THEIR MAJOR AXIS EXTENDING IN A DIRECTION TRANSVERSE SAID PLANE, THE THICKNESS OF SAID PLATE BETWEEN SAID PAS-
Claim 2
Dependent Claim
98 words
A HOLLOW SHEET METAL PLATE HAVING EXTENDING ENTERNALLY THEREIN A SYSTEM OF FLUID PASSAGES WITH SAID PASSAGES COMPRISING SPACED PARALLEL FLUID PASSAGEWAYS EXTENDING LONGITUDINALLY IN SAID PLATE AND ALSO DIDTENDED OUT OF THE PLANE OF SAID PLATE WITH THE DISTENTION OF SAID PASSAGEWAYS IN A CROSS-SECTION THEREOF NORMAL TO SAID PLANE EXTENDING OUT OF SAID PLANE IN AN AMOUNT GREATER THAN THE WIDTH OF SAID PASSAGEWAYS IN SAID CROSS-SECTION ARE ENLONGATED SAID PASSAGEWAYS IN SAID CROSS-SECTION ARE ENLONGATED TO HAVE THEIR MAJOR AXIS EXTENDING IN A DIRECTION TRANSVERSE SAID PLANE, THE THICKNESS OF SAID PLATE BETWEEN SAID PAS-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |