US3510771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level detector having visual indicator lock-up means
Assignee: AT&T Inc
•
Filing: 1967-11-15
•
Granted: 1970-05-05
•
Expires: 1987-11-15
Abstract
No abstract record available.
Inventors
- 👤 Milton L Embree
- 👤 William L Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:56
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16566; G01R19/16576
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3254331A
Cited
US3356898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |