US3491439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heated surface and process to manufacture such a heated surfacing
Assignee: Colfico SA
•
Filing: 1965-03-10
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Granted: 1970-01-27
•
Expires: 1985-03-10
Abstract
No abstract record available.
Inventors
- 👤 Robert Dubois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:08
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/24; E01C11/26; E01C11/265; H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/28; H05B3/283; H05B3/286; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA702077A
Cited
US1349136A
Cited
US2522841A
Cited
US2623150A
Cited
US3060303A
Cited
US3047701A
Cited
US3069522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |