Patent US3061808A successfully refreshed from Google Patents.
US3061808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heaters
Assignee: Edwin L Wiegand Co
•
Filing: 1959-07-24
•
Granted: 1962-10-30
•
Expires: 1979-07-24
Abstract
No abstract record available.
Inventors
- 👤 Wiegand Edwin Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:49
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US912985A
Cited
US1213881A
Cited
US1474723A
Cited
US1727585A
Cited
US1985280A
Cited
US2087736A
Cited
US2253981A
Cited
US2490934A
Cited
US2548423A
Cited
US2866062A
Cited
US2942223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |