Patent US2885040A successfully refreshed from Google Patents.
Patent US2289425A successfully refreshed from Google Patents.
US2289425A
Expired / Lapsed
US
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Device for accumulating, retaining, and discharging heat
Assignee: ETHYL CONWAY HOGAN
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Filing: 1939-09-14
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Granted: 1942-07-14
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Expires: 1959-09-14
Abstract
No abstract record available.
Inventors
- 👤 Hogan Georgia Mae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:19
CPC Classifications
F; F28; F28D; F28D20/00; F28D20/02; F28D20/028; A; A47; A47J; A47J36/00; A47J36/24; A47J36/28; Y; Y02; Y02E; Y02E60/00; Y02E60/14
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) | 1945-07-13 | 1946-01-12 | 1946-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-13 | 1950-01-12 | 1950-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-13 | 1954-01-12 | 1954-07-14 | $7700.00 | Window Closed / Lapsed |