US3385957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronically controlled heater
Assignee: Duracell Inc USA
•
Filing: 1965-08-02
•
Granted: 1968-05-28
•
Expires: 1985-08-02
Abstract
No abstract record available.
Inventors
- 👤 Arden L Munson
- 👤 James A Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:35
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906; G05D23/1909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3020384A
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US3114025A
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US3061744A
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US3149224A
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US3136877A
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US3299319A
Cited
US3299346A
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US3299345A
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US3305766A
Cited
US3299344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |