US1846608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger for refrigerating machines and the like
Assignee: METROPOLITAN ENGINEERING Corp
•
Filing: 1928-10-09
•
Granted: 1932-02-23
•
Expires: 1948-10-09
Abstract
No abstract record available.
Inventors
- 👤 George H Phelps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:02
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/003; F25B; F25B39/00; F25B39/04; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F25B2339/00; F25B2339/04; F25B2339/045; Y; Y10; Y10S; Y10S165/00; Y10S165/228
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) | 1935-02-22 | 1935-08-24 | 1936-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-02-22 | 1939-08-24 | 1940-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-02-22 | 1943-08-24 | 1944-02-23 | $7700.00 | Window Closed / Lapsed |