US2992314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heater assembly
Assignee: Edwin L Wiegand Co
•
Filing: 1959-04-20
•
Granted: 1961-07-11
•
Expires: 1979-04-20
Abstract
No abstract record available.
Inventors
- 👤 Lester D Drugmand
- 👤 Donald M Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:53
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56; H05B3/565
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB287828A
Cited
US2370767A
Cited
US2367369A
Cited
US2740035A
Cited
US2742561A
Cited
US2725457A
Cited
US2748252A
Cited
US2817742A
Cited
US2851577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |