US2111534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer device and method of making same
Assignee: Individual
•
Filing: 1933-12-21
•
Granted: 1938-03-15
•
Expires: 1953-12-21
Abstract
No abstract record available.
Inventors
- 👤 Karmazin John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:22
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/086; Y; Y10; Y10S; Y10S165/00; Y10S165/228; Y10S165/302; Y10S165/303; Y10S165/304; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/4938
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) | 1941-03-14 | 1941-09-13 | 1942-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-03-14 | 1945-09-13 | 1946-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-03-14 | 1949-09-13 | 1950-03-15 | $7700.00 | Window Closed / Lapsed |