US3423569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric air heater for automatic choke
Assignee: Edwin L Wiegand Co
•
Filing: 1962-04-05
•
Granted: 1969-01-21
•
Expires: 1982-04-05
Abstract
No abstract record available.
Inventors
- 👤 Charles W Cappell
- 👤 Gerald H Kreske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:28
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; H; H05; H05B; H05B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US782525A
Cited
US1151586A
Cited
US1237862A
Cited
US2245672A
Cited
CH221542A
Cited
US2906849A
Cited
US3212486A
Cited
US3291461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |