US3174019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum tube interrupter having sequential separable contacts
Assignee: Allis Chalmers Corp
•
Filing: 1962-01-09
•
Granted: 1965-03-16
•
Expires: 1982-01-09
Abstract
No abstract record available.
Inventors
- 👤 Gustav E Jansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:47
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/02; H01H33/04; H01H33/16; H01H33/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1901639A
Cited
GB392898A
Cited
GB523674A
Cited
US2838636A
Cited
US2863026A
Cited
US2965735A
Cited
US3036180A
Cited
US3038980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |