Patent US2552773A successfully refreshed from Google Patents.
US2552773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level marking for telephone line finders
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1947-06-24
•
Granted: 1951-05-15
•
Expires: 1967-06-24
Abstract
No abstract record available.
Inventors
- 👤 Charles F Ffolliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:03
CPC Classifications
H; H04; H04Q; H04Q3/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1656300A
Cited
US1688588A
Cited
US1849694A
Cited
US1914540A
Cited
US1924661A
Cited
US2115320A
Cited
US2133415A
Cited
US2294907A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |