US2499448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Svenska Maskinverken AB
•
Filing: 1945-05-03
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Granted: 1950-03-07
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Expires: 1965-05-03
Abstract
No abstract record available.
Inventors
- 👤 Axelson Eskil Anders August
- 👤 Lofgren Carl Ake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:50
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/16; B05B7/1606; B05B7/1613; B05B7/162; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/395
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) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |