Patent US3470897A successfully refreshed from Google Patents.
US3470897A
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US
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Liquid heater
Assignee: Cory Corp
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Filing: 1966-12-02
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Granted: 1969-10-07
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Expires: 1986-12-02
Abstract
No abstract record available.
Inventors
- 👤 Harvey R Karlen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:21
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/08; F24D19/082; F24D19/083; A; A47; A47J; A47J31/00; A47J31/44; A47J31/54; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/201; F24H1/202; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2774; Y10T137/2788
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2296055A
Cited
FR953390A
Cited
US2779476A
Cited
US3165127A
Cited
US3220334A
Cited
US3354810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |