US1601874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Schutte and Koerting Co
•
Filing: 1925-06-10
•
Granted: 1926-10-05
•
Expires: 1945-06-10
Abstract
No abstract record available.
Inventors
- 👤 Muhleisen Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:11
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0236; F28F9/0241; F28D; F28D7/00; F28D7/16; F28D7/163; F28D7/1638; F28D7/1646; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/405; Y10S165/412
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) | 1929-10-04 | 1930-04-05 | 1930-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-10-04 | 1934-04-05 | 1934-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-10-04 | 1938-04-05 | 1938-10-05 | $7700.00 | Window Closed / Lapsed |