Patent US2922867A successfully refreshed from Google Patents.
US2922867A
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Conductive surface coverage electrical heating elements
Assignee: ELECTROFILM Inc
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Filing: 1958-05-08
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Granted: 1960-01-26
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Expires: 1978-05-08
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Crump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:25
CPC Classifications
B; B64; B64D; B64D15/00; B64D15/12; H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B2203/00; H05B2203/002; H05B2203/005; H05B2203/011; H05B2203/014; H05B2203/015; H05B2203/017; H05B2203/033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |