US2861168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heater panel contact structure
Assignee: BERKO ELECTRIC Manufacturing CORP
•
Filing: 1957-05-14
•
Granted: 1958-11-18
•
Expires: 1977-05-14
Abstract
No abstract record available.
Inventors
- 👤 Knoll David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
F; F24; F24C; F24C7/00; F24C7/04; F24C7/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US416360A
Cited
US747821A
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US1881461A
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US2353061A
Cited
US2502148A
Cited
US2706763A
Cited
US2795682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |