US2633512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for interlocking arcing and disconnect contacts
Assignee: Allis Chalmers Corp
•
Filing: 1949-02-15
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Granted: 1953-03-31
•
Expires: 1969-02-15
Abstract
No abstract record available.
Inventors
- 👤 Gustav E Jansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:46
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/30; H01H33/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1465384A
Cited
US1586953A
Cited
GB504305A
Cited
US2363283A
Cited
US2464237A
Cited
US2450628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |