US2919903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell-tube heat exchange apparatus for condensate subcooling
Assignee: Phillips Petroleum Co
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Filing: 1957-03-18
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Granted: 1960-01-05
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Expires: 1977-03-18
Abstract
No abstract record available.
Inventors
- 👤 Lucien H Vautrain
- 👤 Jr Fred H Morley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:52
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0236; F28F9/0239; F28D; F28D7/00; F28D7/16; F28D7/163; F28D7/1638; F28D7/1646
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |