US2554638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable self-contained liquid cooling apparatus
Assignee: RAYMOND S F GRAHAM
•
Filing: 1949-11-23
•
Granted: 1951-05-29
•
Expires: 1969-11-23
Abstract
No abstract record available.
Inventors
- 👤 Frederick G Riedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:47
CPC Classifications
F; F25; F25D; F25D31/00; F25D31/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2064044A
Cited
US2359791A
Cited
US2134936A
Cited
US1930220A
Cited
US2018521A
Cited
US2347905A
Cited
US2433977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |