US3116402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heaters
Assignee: Edwin L Wiegand Co
•
Filing: 1960-08-11
•
Granted: 1963-12-31
•
Expires: 1980-08-11
Abstract
No abstract record available.
Inventors
- 👤 Lester D Drugmand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:49
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/02; H05B3/06; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/974
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1432243A
Cited
US1742052A
Cited
US2613312A
Cited
US2618731A
Cited
FR1072084A
Cited
US2768012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |