US2518533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reel
Assignee: AT&T Inc
•
Filing: 1945-10-18
•
Granted: 1950-08-15
•
Expires: 1965-10-18
Abstract
No abstract record available.
Inventors
- 👤 Karl C Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:54
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/22; B65H75/2218; B65H75/2227; B65H75/2254; B65H75/2272
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US550701A
Cited
US1001644A
Cited
US1361250A
Cited
US1425895A
Cited
US1554412A
Cited
US1607888A
Cited
US1611472A
Cited
US2007705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |