US2565513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Individual
•
Filing: 1946-04-26
•
Granted: 1951-08-28
•
Expires: 1966-04-26
Abstract
No abstract record available.
Inventors
- 👤 Willard L Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:11
CPC Classifications
F; F25; F25B; F25B39/00; F25B39/02; F25B39/04; F25B43/00; F25B43/02; F25B5/00; F25B5/02; F25B7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1538652A
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US1622134A
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US1899988A
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US2088994A
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US2195228A
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US2149358A
Cited
US2190138A
Cited
US2330326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |