US2269619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Foster Wheeler Inc
•
Filing: 1940-06-18
•
Granted: 1942-01-13
•
Expires: 1960-06-18
Abstract
No abstract record available.
Inventors
- 👤 Samuel J Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:02
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/22; F28D; F28D7/00; F28D7/16; F28D7/1607; F28F9/02; F28F9/0236; F28F9/0241; F28F2265/00; F28F2265/02; F28F2275/00; F28F2275/20; F28F2275/205; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/416; Y10S165/417; Y10S165/418
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-01-12 | 1945-07-14 | 1946-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-12 | 1949-07-14 | 1950-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-12 | 1953-07-14 | 1954-01-13 | $7700.00 | Window Closed / Lapsed |