US2872165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate type heat exchanger
Assignee: Alfa Laval Holdings Amsterdam AB
•
Filing: 1955-08-31
•
Granted: 1959-02-03
•
Expires: 1975-08-31
Abstract
No abstract record available.
Inventors
- 👤 Wennerberg Fritz Johan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:52
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/083; F28D; F28D9/00; F28D9/0031; F28D9/0043; F28D9/005; F28F3/02; F28F3/04; F28F3/042; F28F3/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US945089A
Cited
US1005442A
Cited
US1927174A
Cited
US1972379A
Cited
US2623736A
Cited
US2676000A
Cited
US2705617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |