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Patent US3418448A successfully refreshed from Google Patents.
US3418448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heatable panels
Assignee: H Koch and Sons Co
•
Filing: 1967-01-05
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Granted: 1968-12-24
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Expires: 1987-01-05
Abstract
No abstract record available.
Inventors
- 👤 Pradenas Fernando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:27
CPC Classifications
F; F24; F24D; F24D13/00; F24D13/02; F24D13/022; E; E01; E01C; E01C11/00; E01C11/24; E01C11/26; E01C11/265; Y; Y02; Y02B; Y02B30/00
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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |