US3385348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger unit
Assignee: Carrier Corp
•
Filing: 1964-06-23
•
Granted: 1968-05-28
•
Expires: 1984-06-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Embury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:18
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F25B27/00; F25B29/00; F25B29/003; F25B39/00; F25B39/04; F28; F28B; F28B1/00; F28B1/02; F25B2339/00; F25B2339/02; F25B2339/024; F25B2339/0242; F25B2339/04; F25B2339/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US957688A
Cited
US2196911A
Cited
US2995343A
Cited
US3153442A
Cited
US3131553A
Cited
US3171268A
Cited
US3158008A
Cited
US3276218A
Cited
US3304997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |