Patent US3015153A successfully refreshed from Google Patents.
US3015153A
Expired / Lapsed
US
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Method of making a heat regenerator
Assignee: Hartford National Bank and Trust Co
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Filing: 1956-08-23
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Granted: 1962-01-02
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Expires: 1976-08-23
Abstract
No abstract record available.
Inventors
- 👤 Liebe August Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:16
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/057; F28; F28D; F28D17/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49357; Y10T29/49826; Y10T29/49863; Y10T29/49879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2166634A
Cited
US2353951A
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US2390160A
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US2438867A
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US2581467A
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US2631668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |