US2939685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser deaerator
Assignee: Lummus Technology LLC
•
Filing: 1955-12-14
•
Granted: 1960-06-07
•
Expires: 1975-12-14
Abstract
No abstract record available.
Inventors
- 👤 George A Worn
- 👤 Jr George W Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:59
CPC Classifications
F; F28; F28B; F28B1/00; F28B1/02; F28B9/00; F28B9/10; Y; Y10; Y10S; Y10S165/00; Y10S165/184; Y10S165/192; Y10S261/00; Y10S261/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US979540A
Cited
DE417256C
Cited
AU1705428A
Cited
US1812591A
Cited
US1855231A
Cited
US2247514A
Cited
US2542873A
Cited
US2663547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |