Patent US3453416A successfully refreshed from Google Patents.
US3453416A
Expired / Lapsed
US
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Heat storage apparatus
Assignee: Hooker Chemical Corp
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Filing: 1967-11-20
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Granted: 1969-07-01
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Expires: 1987-11-20
Abstract
No abstract record available.
Inventors
- 👤 Matthew Mekjean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:04
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; H05B3/50; F; F24; F24H; F24H7/00; F24H7/002; F24H7/02; F24H7/04; F24H7/0408; F24H7/0433
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1802695A
Cited
GB471505A
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US2181484A
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US2469801A
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US2697130A
Cited
US2649532A
Cited
US2911513A
Cited
US2936741A
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US3170227A
Cited
US3213263A
Cited
US3356834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |