US3203472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchangers
Assignee: Individual
•
Filing: 1963-11-22
•
Granted: 1965-08-31
•
Expires: 1983-11-22
Abstract
No abstract record available.
Inventors
- 👤 Brandt Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:11
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/04; F28D; F28D17/00; F28D17/02; F28D19/00; F28D19/04; F28D19/041; F28D19/042
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
IN A REGENERATIVE HEAT EXCHANGER HAVING AN ANNULAR HEAT EXCHANGE DRUM MOUNTED BETWEEN HEADERS AND HAVING RELATIVELY DISPLACED INLET AND OUTLET OPENINGS FOR A HEATING GAS AND A GAS TO BE HEATED, WHICH OPENINGS REGISTER WITH A DIFFERENT AND LIMITED CROSS SECTIONAL AREA OF THE HEAT EXCHANGE DRUM AT ANY ONE TIME BY RELATIVE ROTATION OF THE DRUM AND THE HEADERS, THE IMPROVEMENT WHICH COMPRISES A HEAT STORING AND TRANSFERRING MASS COMPRISING THIN METAL SHEETS IN THE HOT SECTION OF THE HEAT EXCHANGER IN COMMUNICATION WITH CERAMIC BLOCKS WITH A MULTIPLICITY OF PASSAGES THERETHROUGH HAVING SMOOTH
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |