Patent US1992795A successfully refreshed from Google Patents.
US1992795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer unit
Assignee: Individual
•
Filing: 1933-07-07
•
Granted: 1935-02-26
•
Expires: 1953-07-07
Abstract
No abstract record available.
Inventors
- 👤 Fred M Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:46
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/16; F28F9/165; F28F9/167; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; F28D1/0535; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F28F1/32; F28F1/34; Y; Y10; Y10S; Y10S165/00; Y10S165/228; Y10S165/302; Y10S165/316
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) | 1938-02-25 | 1938-08-27 | 1939-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-02-25 | 1942-08-27 | 1943-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-02-25 | 1946-08-27 | 1947-02-26 | $7700.00 | Window Closed / Lapsed |