US2814686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warp switch
Assignee: Penn Controls Inc
•
Filing: 1956-09-24
•
Granted: 1957-11-26
•
Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Justin E Wilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:30
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/60; H01H37/64; H01H61/00; H01H61/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE410794C
Cited
US2446307A
Cited
US2436909A
Cited
US2568323A
Cited
US2498127A
Cited
US2641668A
Cited
US2774836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |