US2690299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing system
Assignee: AT&T Inc
•
Filing: 1948-08-13
•
Granted: 1954-09-28
•
Expires: 1968-08-13
Abstract
No abstract record available.
Inventors
- 👤 Lindley A Kille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:31
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10009; G06K7/10366; G06K7/10415; G06K7/10425; G06K7/10435; G06K7/10445; G11; G11B; G11B27/00; G11B27/36; G11B2220/00; G11B2220/90
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1902013A
Cited
US2475315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |