Patent US2601973A successfully refreshed from Google Patents.
US2601973A
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Layered element for heat transfer cores
Assignee: Alstom Power Inc
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Filing: 1949-06-25
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Granted: 1952-07-01
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Expires: 1969-06-25
Abstract
No abstract record available.
Inventors
- 👤 Jensen Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:42
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/02; F28D; F28D9/00; F28D9/0012; F28D9/0018; F28D9/0081; F28F1/04; F28F1/045; F28F1/10; F28F1/12; F28F1/24; F28F1/32; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/442; Y10S165/449; Y10S165/45
Claims Analysis
Total Claims: 0
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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) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |