US3272260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion resistant heat exchanger
Assignee: Union Carbide Corp
•
Filing: 1961-08-11
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Granted: 1966-09-13
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Expires: 1981-08-11
Abstract
No abstract record available.
Inventors
- 👤 Samuel H S Raub
- 👤 Starling F Joachim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:29
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/02; F28F7/00; F28F7/02; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/395; Y10S165/396
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A HEAT EXCHANGER FOR TWO FLUIDS WHICH COMPRISES IN COMBINATION TWO HEADERS FABRICATED FROM MONOLITHIC BLOCKS OF IMPERVIOUS GRAPHITE, SAID HEADERS BEING PROVIDED WITH A PLURALITY OF ROWS OF HORIZONTAL DRILLED PASSAGEWAYS ALL OF WHOSE AXES ARE PARALLEL TO ONE ANOTHER,
Claim 2
Dependent Claim
41 words
A HEAT EXCHANGER FOR TWO FLUIDS WHICH COMPRISES IN COMBINATION TWO HEADERS FABRICATED FROM MONOLITHIC BLOCKS OF IMPERVIOUS GRAPHITE, SAID HEADERS BEING PROVIDED WITH A PLURALITY OF ROWS OF HORIZONTAL DRILLED PASSAGEWAYS ALL OF WHOSE AXES ARE PARALLEL TO ONE ANOTHER,
References Cited (Backward Citations)
DE1068851B
Cited
GB665899A
Cited
FR1072430A
Cited
US2821369A
Cited
US2915295A
Cited
US2887304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |