Patent US2678808A successfully refreshed from Google Patents.
US2678808A
Expired / Lapsed
US
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Sinuous wire structural and heat exchange element and assembly
Assignee: Individual
•
Filing: 1949-11-23
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Granted: 1954-05-18
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Expires: 1969-11-23
Abstract
No abstract record available.
Inventors
- 👤 Jr John R Gier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:27
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F3/00; F28F3/02; F28F3/022; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190608183A
Cited
US1655273A
Cited
US2268680A
Cited
US2595457A
Cited
US2469635A
Cited
US2505619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |