US3477058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesia insulated heating elements and methods of production
Assignee: General Electric Co
•
Filing: 1968-02-01
•
Granted: 1969-11-04
•
Expires: 1988-02-01
Abstract
No abstract record available.
Inventors
- 👤 Willem Vedder
- 👤 John Schultz Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:18
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; H05B3/10; H05B3/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49089
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2280517A
Cited
US3201738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |