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US2737571A
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Electric resistance heating device
Assignee: TECHNOGRAPH PRINTED CIRCUITS L
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Filing: 1953-07-29
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Granted: 1956-03-06
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Expires: 1973-07-29
Abstract
No abstract record available.
Inventors
- 👤 Eisler Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:43
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/78; H05B3/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1065015A
Cited
US1028107A
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US1332030A
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US2034800A
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US2000438A
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US2060795A
Cited
US2504146A
Cited
US2329766A
Cited
US2643320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |