US3399266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphite heating element assembly and furnaces containing same
Assignee: GREAT LAKES CARBON Corp
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Filing: 1966-04-28
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Granted: 1968-08-27
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Expires: 1986-04-28
Abstract
No abstract record available.
Inventors
- 👤 Edward C Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:56
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/02; D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/32; H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/145; H05B3/40; H05B3/42; H05B3/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |