US2667337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Finned element for thermal or heat transfer purposes
Assignee: Individual
•
Filing: 1947-08-06
•
Granted: 1954-01-26
•
Expires: 1967-08-06
Abstract
No abstract record available.
Inventors
- 👤 Chapman Everett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:20
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/34; F28F1/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1459024A
Cited
DE117992C
Cited
US2239944A
Cited
US1343352A
Cited
US1395618A
Cited
US1850473A
Cited
US1893270A
Cited
US1909704A
Cited
US1950623A
Cited
US1997197A
Cited
US1974235A
Cited
US1972230A
Cited
US1992296A
Cited
US2190429A
Cited
US2162694A
Cited
US2162693A
Cited
US2396795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |