US1833166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Babcock and Wilcox Co
•
Filing: 1928-09-13
•
Granted: 1931-11-24
•
Expires: 1948-09-13
Abstract
No abstract record available.
Inventors
- 👤 Charles E Lucke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:07
CPC Classifications
F; F28; F28F; F28F27/00; F28F27/02; F28D; F28D9/00; F28D9/0025; F28F9/00; F28F9/02; F28F9/026; F28F9/0265; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/901; Y10S165/903
Claims Analysis
Total Claims: 0
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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) | 1934-11-23 | 1935-05-25 | 1935-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-23 | 1939-05-25 | 1939-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-23 | 1943-05-25 | 1943-11-24 | $7700.00 | Window Closed / Lapsed |