US2851549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalclad switchgear with interlock
Assignee: BBC Brown Boveri Canada Inc
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Filing: 1957-02-18
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Granted: 1958-09-09
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Expires: 1977-02-18
Abstract
No abstract record available.
Inventors
- 👤 Konrad H Keller
- 👤 Sydney H Flood
- 👤 Buser Willy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:16
CPC Classifications
H; H02; H02B; H02B11/00; H02B11/12; H02B11/127; H02B11/133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |