US2180237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerating apparatus
Assignee: R B DAVENPORT JR
•
Filing: 1938-03-28
•
Granted: 1939-11-14
•
Expires: 1958-03-28
Abstract
No abstract record available.
Inventors
- 👤 Krieger W Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:02
CPC Classifications
F; F25; F25D; F25D31/00; F25D31/006; F25D31/007; F25D11/00; F25D29/00; F25D17/00; F25D17/04; F25D2331/00; F25D2331/80; F25D2331/803; F25D2400/00; F25D2400/10; F25D25/00; F25D25/02; F25D25/028
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) | 1942-11-13 | 1943-05-15 | 1943-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-11-13 | 1947-05-15 | 1947-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-11-13 | 1951-05-15 | 1951-11-14 | $7700.00 | Window Closed / Lapsed |