US3665598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a heating body
Assignee: Individual
•
Filing: 1970-12-17
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Granted: 1972-05-30
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Expires: 1990-12-17
Abstract
Abstract Electrical resistance heating conductor, surrounded by an electric insulating cylindric layer of borium nitride or beryllium oxide, coated off by outward heat dissipating liner. Between conductor, intermediate layer and outward liner are at all times shrinking fits sustained. Conductor and liner consist of austanitic stainless steel, molybdenum, nickel, chromium, vanadium, rhenium, tungsten or its alloys.
Inventors
- 👤 Meindert Willem Brieko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:40
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/0054; H05; H05B; H05B3/00; H05B3/40; H05B3/42; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49083; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/2933; Y10T428/294; Y10T428/2958
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2001848A
Cited
US3121154A
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US3356834A
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US3513539A
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US3492463A
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US3514850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |