US2672590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delay line
Assignee: AT&T Inc
•
Filing: 1950-03-22
•
Granted: 1954-03-16
•
Expires: 1970-03-22
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Mcskimin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/36; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2263902A
Cited
US2430013A
Cited
US2416337A
Cited
US2532546A
Cited
US2505515A
Cited
US2458581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |