US3299945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-storage apparatus
Assignee: Comstock and Wescott Inc
•
Filing: 1964-08-24
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Granted: 1967-01-24
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Expires: 1984-08-24
Abstract
No abstract record available.
Inventors
- 👤 Richard E Rice
- 👤 William E Whitney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:42
CPC Classifications
F; F24; F24H; F24H7/00; F24H7/02; F24H7/04; F24H7/0408; F24H7/0416; Y; Y10; Y10S; Y10S165/00; Y10S165/539
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
151 words
APPARATUS COMPRISING AN ENCLOSURE CONTAINING HEATSTORAGE MEANS WITH A PASSAGEWAY THROUGH THE ENCLOSURE, CHARACTERIZED IN THAT THE ENCLOSURE COMPRISES FOUR CONCENTRIC CYLINDERS, NAMELY, A FIRST OUTER CYLINDER EXTENDING TO THE TOP OF THE ENCLOSURE, A SECOND CYLINDER SPACED INWARDLY OF THE FIRST CYLINDER AND EXTENDING FROM THE BOTTOM OF THE ENCLOSURE, A THIRD CYLINDER FORMED OF HEATSTORAGE MATERIAL SPACED INWARDLY OF THE SECOND CYLINDER AND EXTENDING FROM THE TOP OF THE ENCLOSURE TO A POINT ABOVE THE BOTTOM OF THE ENCLOSURE, AND A FOURTH CYLINDER SPACED INWARDLY FROM THE THIRD CYLINDER AND EXTENDING FROM THE BOTTOM OF THE ENCLOSURE TO A POINT BELOW THE TOP OF THE ENCLOSURE, SAID CYLINDERS TOGETHER WITH THE BOTTOM AND TOP OF THE ENCLOSURE FORMING A PASSAGE LEADING FROM AN OPENING AT THE BOTTOM OF THE FIRST CYLINDER THROUGH A PATH UPWARDLY BETWEEN THE FIRST AND SECOND CYLINDERS, THENCE DOWNWARDLY BETWEEN THE SECOND AND THIRD CYLIN-
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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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |