US2111774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration
Assignee: Servel Inc
•
Filing: 1934-07-07
•
Granted: 1938-03-22
•
Expires: 1954-07-07
Abstract
No abstract record available.
Inventors
- 👤 William R Hainsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:51
CPC Classifications
F; F24; F24C; F24C5/00; F24C5/16; F23; F23D; F23D99/00; F23D99/002; F23D99/004; F23D2206/00; F23D2206/0057; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/6416; Y10T137/6443; Y10T137/6851; Y10T137/7032; Y10T137/7036; Y10T137/7287; Y10T137/7297; Y10T137/7313; Y10T137/7316; Y10T137/7323; Y10T137/7722; Y10T137/7723
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) | 1941-03-21 | 1941-09-20 | 1942-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-03-21 | 1945-09-20 | 1946-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-03-21 | 1949-09-20 | 1950-03-22 | $7700.00 | Window Closed / Lapsed |