Patent US2601974A successfully refreshed from Google Patents.
US2601974A
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Plate heat exchanger
Assignee: Alfa Laval Holdings Amsterdam AB
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Filing: 1947-09-18
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Granted: 1952-07-01
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Expires: 1967-09-18
Abstract
No abstract record available.
Inventors
- 👤 Hytte Robert P Larsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:35
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/083; F16; F16B; F16B2200/00; F16B2200/69; F16B2200/71; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7018
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US440671A
Cited
US1142021A
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US1359162A
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FR800478A
Cited
GB528223A
Cited
US2252916A
Cited
NL52142C
Cited
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 |