US3059908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Individual
•
Filing: 1959-09-29
•
Granted: 1962-10-23
•
Expires: 1979-09-29
Abstract
No abstract record available.
Inventors
- 👤 Iii Thomas H Fox
- 👤 Jr Thomas Richey
- 👤 Gordon R Winders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:52
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/0066; F28D21/00; F28D2021/0019; F28D2021/0054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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DE383334C
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US2839276A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |