US2426536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated heat-exchange fin
Assignee: Chase Brass and Copper Co Inc
•
Filing: 1944-07-07
•
Granted: 1947-08-26
•
Expires: 1964-07-07
Abstract
No abstract record available.
Inventors
- 👤 Raimund G Vanderweil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:21
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/02; F02F1/04; F02F1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR607459A
Cited
US1659920A
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US1788474A
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US1806186A
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US1693520A
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US1898028A
Cited
US2085041A
Cited
US2184345A
Cited
US2271131A
Cited
US2368403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-25 | 1951-02-24 | 1951-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-25 | 1955-02-24 | 1955-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-25 | 1959-02-24 | 1959-08-26 | $7700.00 | Window Closed / Lapsed |