US2731245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Finned conduit and method of attaching fins to conduit
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1951-09-14
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Granted: 1956-01-17
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Expires: 1971-09-14
Abstract
No abstract record available.
Inventors
- 👤 Vernon A Mcchesney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:04
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; Y; Y10; Y10S; Y10S165/00; Y10S165/51; Y10S165/518; Y10S165/524; Y10S165/525; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49384
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1721878A
Cited
US1758638A
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US1942211A
Cited
US1931154A
Cited
US2308319A
Cited
US2327259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |