US2061869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerating system
Assignee: Individual
•
Filing: 1930-04-19
•
Granted: 1936-11-24
•
Expires: 1950-04-19
Abstract
No abstract record available.
Inventors
- 👤 Gilbert James Walter
- 👤 Ernest F Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:14
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/003; F04; F04B; F04B43/00; F04B43/08; F04B43/086; F04B45/00; F04B45/02; F04B45/027; F25B; F25B1/00; F25B1/02; F25B40/00; F25B40/06; F25D2323/00; F25D2323/002; F25D2323/0026; F25D2323/00263; F25D2323/00266; F25D2323/0027; F25D2323/00273; F25D2323/00278
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) | 1939-11-24 | 1940-05-25 | 1940-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-11-24 | 1944-05-25 | 1944-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-11-24 | 1948-05-25 | 1948-11-24 | $7700.00 | Window Closed / Lapsed |