US2584189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making extended surface heat exchangers
Assignee: Svenska Maskinverken AB
•
Filing: 1949-03-21
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Granted: 1952-02-05
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Expires: 1969-03-21
Abstract
No abstract record available.
Inventors
- 👤 Dalin David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:45
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/124; B; B23; B23K; B23K11/00; B23K11/002; B23K11/004; B23K11/0046; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US455420A
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US1062571A
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US1887513A
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US2003320A
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US2220579A
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US2231480A
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US2327924A
Cited
US2337294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |