US2545280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange apparatus
Assignee: ANSONIA COPPER AND IRON WORKS
•
Filing: 1947-05-15
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Granted: 1951-03-13
•
Expires: 1967-05-15
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Hollmeyer
- 👤 Buchert Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:52
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/26; C; C12; C12C; C12C7/00; C12C7/26; F28D; F28D7/00; F28D7/10; F28D7/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US769379A
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US1067505A
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US1559949A
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US1697696A
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US2259433A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |