Patent US2180180A successfully refreshed from Google Patents.
Patent US3108362A successfully refreshed from Google Patents.
US3108362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making tubular heat exchanger
Assignee: Individual
•
Filing: 1958-10-02
•
Granted: 1963-10-29
•
Expires: 1978-10-02
Abstract
No abstract record available.
Inventors
- 👤 Huet Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:57
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/29; B21C37/298; F; F28; F28F; F28F9/00; F28F9/02; F28F9/0243; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49389; Y10T29/49391
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR PROVIDING INTEGRAL UNIONS IN THE WALL OF A HEADER WHICH ARE OTHER THAN PREPENDICULAR TO THE AXIS OF SAID HEADER, COMPRISING THE STEPS OF SHAPING THE MATERIAL OF THE WALL OF THE HEADER BY THE APPLICATION OF FORCE IN A DIRECTION PREPENDICULAR TO THE AXIS OF THE HEADER TO FORM AN UNSYMMETRICAL BLANK FOR THE UNION HAVING AN UNSYMMETRICAL OUTWARDLY-EXTENDING PORTION TO DEFINE THE WALL OF SAID UNION, AND SURROUNDING A CENTRAL APERTURE, AND SHAPING SAID BLANK BY ACTING UPON SAID OUTWARDLYEXTENDING PORTION WITH PUNCHES AND DIES MOVING IN A DIRECTION OTHER THAN A DIRECTION PREPENDICULAR TO THE AXIS OF THE HEADER TO FORM SAID PORTION INTO A UNION HAVING AN AXIS WHICH IS OTHER THAN PREPENDICULAR TO THE WALL OF THE HEADER.
Claim 2
Dependent Claim
126 words
A PROCESS FOR PROVIDING INTEGRAL UNIONS IN THE WALL OF A HEADER WHICH ARE OTHER THAN PREPENDICULAR TO THE AXIS OF SAID HEADER, COMPRISING THE STEPS OF SHAPING THE MATERIAL OF THE WALL OF THE HEADER BY THE APPLICATION OF FORCE IN A DIRECTION PREPENDICULAR TO THE AXIS OF THE HEADER TO FORM AN UNSYMMETRICAL BLANK FOR THE UNION HAVING AN UNSYMMETRICAL OUTWARDLY-EXTENDING PORTION TO DEFINE THE WALL OF SAID UNION, AND SURROUNDING A CENTRAL APERTURE, AND SHAPING SAID BLANK BY ACTING UPON SAID OUTWARDLYEXTENDING PORTION WITH PUNCHES AND DIES MOVING IN A DIRECTION OTHER THAN A DIRECTION PREPENDICULAR TO THE AXIS OF THE HEADER TO FORM SAID PORTION INTO A UNION HAVING AN AXIS WHICH IS OTHER THAN PREPENDICULAR TO THE WALL OF THE HEADER.
References Cited (Backward Citations)
US2511836A
Cited
US755718A
Cited
GB190325045A
Cited
US896762A
Cited
US1153489A
Cited
US1269908A
Cited
US2275520A
Cited
US2309099A
Cited
US2373901A
Cited
US2306945A
Cited
US2553742A
Cited
AT182937B
Cited
US2736949A
Cited
US2861335A
Cited
US2910897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |