US3424235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cooled condenser with provision for prevention of condensate freezing
Assignee: Lummus Technology LLC
•
Filing: 1966-10-11
•
Granted: 1969-01-28
•
Expires: 1986-10-11
Abstract
No abstract record available.
Inventors
- 👤 Willem Schoonman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:46
CPC Classifications
F; F28; F28B; F28B1/00; F28B1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2614816A
Cited
GB900407A
Cited
US3231013A
Cited
US3204693A
Cited
US3225824A
Cited
US3280900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |