US3356834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for storing heat
Assignee: Hooker Chemical Corp
•
Filing: 1964-05-11
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Granted: 1967-12-05
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Expires: 1984-05-11
Abstract
No abstract record available.
Inventors
- 👤 Mekjean Matthew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:17
CPC Classifications
F; F24; F24H; F24H7/00; F24H7/002
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
44 words
A RESERVOIR COMPRISING A HEAT STORAGE MEDIUM OF A SUBSTANTIALLY ANHYDROUS ALKALI METAL HYDROXIDE AND A NONREDUCING SALT, AN ELECTRIC HEATING ELEMENT IMMERSED IN THE MEDIUM AND HAVING RESISTOR MEANS TO HEAT THE MEDIUM, AND A COVERING MATERIAL OF MILD STEEL WHICH CONTAINS LESS
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |