US2661190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser with subcooler and venting means
Assignee: Stone and Webster Engineering Corp
•
Filing: 1953-01-29
•
Granted: 1953-12-01
•
Expires: 1973-01-29
Abstract
No abstract record available.
Inventors
- 👤 Kirkpatrick Alton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:49
CPC Classifications
F; F28; F28B; F28B1/00; F28B1/02; F28B9/00; Y; Y10; Y10S; Y10S165/00; Y10S165/001; Y10S165/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2412573A
Cited
US2489944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |