US2900461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical switching units
Assignee: Individual
•
Filing: 1955-06-01
•
Granted: 1959-08-18
•
Expires: 1975-06-01
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Allison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:21
CPC Classifications
H; H01; H01H; H01H19/00; H01H19/54; H01H19/56; H01H19/58
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2177481A
Cited
GB501556A
Cited
US2292717A
Cited
US2631211A
Cited
US2497747A
Cited
US2557234A
Cited
US2584176A
Cited
US2682643A
Cited
GB676343A
Cited
US2650960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |