US3740529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating unit
Assignee: General Electric Co
•
Filing: 1971-11-01
•
Granted: 1973-06-19
•
Expires: 1991-11-01
Abstract
Abstract An in situ heating unit is provided by embedding an electric heating element in a flexible laminar structure impregnated with partially polymerized high-temperature-resistant resin. The object to be heated is easily and conformably wrapped in the laminate and electric current passed through the heating element to cure the resin, providing a low cost, adherent, void-free, efficient heating unit which is resistant to elevated temperatures and physical abuse.
Inventors
- 👤 R Falk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:33
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2938992A
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US3218436A
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US3296415A
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US3281579A
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US3344385A
Cited
US3387333A
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US3446909A
Cited
US3657517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |