US3133527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Booster heater
Assignee: HEAT KING CORP
•
Filing: 1957-12-16
•
Granted: 1964-05-19
•
Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Donald E Mizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:09
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02; F02N19/04; F02N19/10; B; B60; B60H; B60H1/00; B60H1/02; B60H1/03; B60H1/032; F24; F24H; F24H1/00; F24H1/22; F24H1/24; F24H1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB666176A
Cited
US2617399A
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US2694444A
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US2681052A
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US2844195A
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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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |