US3063681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer of heat from superheated vapor in a condensing heat exchanger
Assignee: Shell USA Inc
•
Filing: 1956-07-23
•
Granted: 1962-11-13
•
Expires: 1976-07-23
Abstract
No abstract record available.
Inventors
- 👤 Howard Q Duguid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:02
CPC Classifications
F; F28; F28B; F28B5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1886590A
Cited
US2069653A
Cited
US2576843A
Cited
US2537259A
Cited
US2619453A
Cited
US2685280A
Cited
US2822784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |