US2614816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser
Assignee: ENGINEERING CONTROLS Inc
•
Filing: 1947-02-24
•
Granted: 1952-10-21
•
Expires: 1967-02-24
Abstract
No abstract record available.
Inventors
- 👤 Robert R Hull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:39
CPC Classifications
F; F01; F01P; F01P3/00; F01P3/22; F28; F28B; F28B1/00; F28B1/06; F01P2003/2214; F01P2003/2228; F28B2001/065; Y; Y10; Y10S; Y10S165/00; Y10S165/184; Y10S165/204; Y10S165/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US838427A
Cited
US1558009A
Cited
US1639745A
Cited
FR710381A
Cited
GB404517A
Cited
FR778155A
Cited
FR805234A
Cited
US2229032A
Cited
US2449110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |