Patent US3060870A successfully refreshed from Google Patents.
US3060870A
Expired / Lapsed
US
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Heat storage units
Assignee: Individual
•
Filing: 1959-07-08
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Granted: 1962-10-30
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Expires: 1979-07-08
Abstract
No abstract record available.
Inventors
- 👤 Andrew M Hexdall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:57
CPC Classifications
F; F28; F28D; F28D17/00; F23; F23M; F23M20/00; F24; F24H; F24H7/00; F24H7/02; F24H7/04; F24H9/00; F24H9/0052; Y; Y10; Y10S; Y10S165/00; Y10S165/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1016565A
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US1080368A
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US1239223A
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US1370722A
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US2298857A
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US2409279A
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US2601167A
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US2677664A
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US2833532A
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US2858781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |