Patent US3489872A successfully refreshed from Google Patents.
US3489872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular type multi-stage interrupter with ionized gas assisting in breakdown and eventual arc extinction
Assignee: General Electric Co
•
Filing: 1967-09-22
•
Granted: 1970-01-13
•
Expires: 1987-09-22
Abstract
No abstract record available.
Inventors
- 👤 Robert T Casey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:20
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/46; H01H33/00; H01H33/02; H01H33/04; H01H33/16; H01H33/164
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB190525287A
Cited
US1819207A
Cited
US2508954A
Cited
US2900566A
Cited
GB991926A
Cited
US3093766A
Cited
US3430016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |