US2677243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the storage of heat
Assignee: Individual
•
Filing: 1952-08-28
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Granted: 1954-05-04
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Expires: 1972-08-28
Abstract
No abstract record available.
Inventors
- 👤 Telkes Maria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:44
CPC Classifications
F; F28; F28D; F28D20/00; F28D20/02; F28D20/028; F25; F25B; F25B13/00; F25B30/00; F25B30/02; F25B2400/00; F25B2400/24; Y; Y02; Y02E; Y02E60/00; Y02E60/14; Y10; Y10S; Y10S165/00; Y10S165/902
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
20 words
APPARATUS FOR STORING HEAT COMPRISING AN AIR CHAMBER AND A FLUID CONDUIT, A CLOSED CONTAINER MADE OF HEAT-CONDUCTING MATERIAL AND
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |