Patent US3001140A successfully refreshed from Google Patents.
US2974222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication systems
Assignee: International Standard Electric Corp
•
Filing: 1958-03-28
•
Granted: 1961-03-07
•
Expires: 1978-03-28
Abstract
No abstract record available.
Inventors
- 👤 Lawson Anthony Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:59
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/01; G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/585; G01S13/586; H04B1/00; H04B1/38; H04B1/40; H04B1/50; H04B1/54; Y; Y10; Y10S; Y10S367/00; Y10S367/904
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |