US2169664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system
Assignee: LOTUS FOVAL
•
Filing: 1936-07-29
•
Granted: 1939-08-15
•
Expires: 1956-07-29
Abstract
No abstract record available.
Inventors
- 👤 John A Shiffiett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:04
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00007; B60H1/00207; B60H1/32; B60H1/3204; B60H1/3222; F; F25; F25D; F25D11/00; F25D11/003
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) | 1942-08-14 | 1943-02-13 | 1943-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-14 | 1947-02-13 | 1947-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-14 | 1951-02-13 | 1951-08-15 | $7700.00 | Window Closed / Lapsed |