US2983486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Element arrangement for a regenerative heat exchanger
Assignee: Alstom Power Inc
•
Filing: 1958-09-15
•
Granted: 1961-05-09
•
Expires: 1978-09-15
Abstract
No abstract record available.
Inventors
- 👤 George E Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:03
CPC Classifications
F; F28; F28G; F28G7/00; F28D; F28D19/00; F28D19/04; F28D19/041; F28D19/042; F28D19/044; F28G9/00; F28G9/005; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/01; Y10S165/011
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |