US2418619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Finned tube
Assignee: Brown Fintube Co
•
Filing: 1943-08-11
•
Granted: 1947-04-08
•
Expires: 1963-08-11
Abstract
No abstract record available.
Inventors
- 👤 Jr John W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:01
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F28F1/30; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB340765A
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US1967728A
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US2089340A
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US2067678A
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US2220579A
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US2219352A
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GB492108A
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US2216778A
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US2261136A
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US2298249A
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US2261137A
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US2355621A
Cited
US2298250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-07 | 1950-10-07 | 1951-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-07 | 1954-10-07 | 1955-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-07 | 1958-10-07 | 1959-04-08 | $7700.00 | Window Closed / Lapsed |