US2978563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposed resistance electric heater
Assignee: TUTTLE ELECTRIC PRODUCTS Inc
•
Filing: 1958-06-12
•
Granted: 1961-04-04
•
Expires: 1978-06-12
Abstract
No abstract record available.
Inventors
- 👤 Amos W Hackman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:20
CPC Classifications
A; A45; A45D; A45D20/00; A45D20/22; A45D20/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR545875A
Cited
US1419309A
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US1057745A
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US1399428A
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US1553421A
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US1756033A
Cited
US1809565A
Cited
US2611790A
Cited
US2846536A
Cited
US2744946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |