US3548399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact-monitoring fault indicators
Assignee: Cutler Hammer Inc
•
Filing: 1967-10-18
•
Granted: 1970-12-15
•
Expires: 1987-10-18
Abstract
No abstract record available.
Inventors
- 👤 Robert E Monigal
- 👤 Robert N Eck
- 👤 Walter A Gossfeld
- 👤 William C Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:12
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2719966A
Cited
US3021515A
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US3011162A
Cited
US3179930A
Cited
US3171112A
Cited
US3243796A
Cited
US3277460A
Cited
US3428943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |