US2640194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate heat exchanger
Assignee: Alfa Laval Holdings Amsterdam AB
•
Filing: 1949-07-12
•
Granted: 1953-05-26
•
Expires: 1969-07-12
Abstract
No abstract record available.
Inventors
- 👤 Hytte Robert Pontus Larsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:29
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/06; F28F3/00; F28F3/02; F28F3/04; F28F3/042; F28F3/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1029099A
Cited
US1023793A
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GB186396A
Cited
US1804083A
Cited
US1792768A
Cited
FR739922A
Cited
GB392065A
Cited
DE679716C
Cited
US2233592A
Cited
GB517406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |