US2853765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making sheathed electric resistance heaters
Assignee: Edwin L Wiegand Co
•
Filing: 1954-08-26
•
Granted: 1958-09-30
•
Expires: 1974-08-26
Abstract
No abstract record available.
Inventors
- 👤 Wemhoener Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:18
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49089; Y10T29/49091
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB496650A
Cited
US2413477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |