US2780705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric heater
Assignee: RESDEL ENGINEERING Corp
•
Filing: 1954-11-19
•
Granted: 1957-02-05
•
Expires: 1974-11-19
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Siegmeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:47
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1200796A
Cited
DE476062C
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US2222784A
Cited
US2310054A
Cited
US2397167A
Cited
US2442451A
Cited
GB613354A
Cited
US2632090A
Cited
US2623981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |