US3375867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Matrix system for low temperature engine regenerators
Assignee: Malaker Corp
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Filing: 1965-10-06
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Granted: 1968-04-02
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Expires: 1985-10-06
Abstract
No abstract record available.
Inventors
- 👤 John G Daunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:24
CPC Classifications
F; F28; F28D; F28D17/00; F28D17/02; F25; F25B; F25B2309/00; F25B2309/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A REGENERATOR FOR LOW TEMPERATURE ENGINES OF THE CLASS DESCRIBED, AND OPERATING BELOW ABOUT 30* K., COMPRISING, A HOLLOW CONTAINER HAVING AN INLET AND A DISCHARGE AND A CHANNELED MATRIX MATERIAL TIGHTLY PACKED IN SAID CONTAINER, SAID MATERIAL COMPRISING A LANTHANIDE METAL OF THE CLASS CONSISTING OF NEODYMIUM, CERIUM, ERBIUM, HOLMIUM AND SAMARIUM WHICH METAL UNDERGOES AT LEAST ONE RAPID REVERSIBLE MAGNETIC TRANSFORMATION IN THE TEMPERATURE RANGE OF ABOUT 5*K. TO ABOUT 20*K., WHEREIN ITS HEAT CAPACITY PER UNIT VOLUME IS AT LEAST 1.30 TIMES GREATER THAN THAT OF LEAD WITHIN SAID TEMPERATURE RANGE.
Claim 2
Dependent Claim
94 words
A REGENERATOR FOR LOW TEMPERATURE ENGINES OF THE CLASS DESCRIBED, AND OPERATING BELOW ABOUT 30* K., COMPRISING, A HOLLOW CONTAINER HAVING AN INLET AND A DISCHARGE AND A CHANNELED MATRIX MATERIAL TIGHTLY PACKED IN SAID CONTAINER, SAID MATERIAL COMPRISING A LANTHANIDE METAL OF THE CLASS CONSISTING OF NEODYMIUM, CERIUM, ERBIUM, HOLMIUM AND SAMARIUM WHICH METAL UNDERGOES AT LEAST ONE RAPID REVERSIBLE MAGNETIC TRANSFORMATION IN THE TEMPERATURE RANGE OF ABOUT 5*K. TO ABOUT 20*K., WHEREIN ITS HEAT CAPACITY PER UNIT VOLUME IS AT LEAST 1.30 TIMES GREATER THAN THAT OF LEAD WITHIN SAID TEMPERATURE RANGE.
References Cited (Backward Citations)
US2958935A
Cited
US3074244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |