Patent US2579324A successfully refreshed from Google Patents.
US2579324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic structure for delaying propagated waves
Assignee: AT&T Inc
•
Filing: 1947-05-16
•
Granted: 1951-12-18
•
Expires: 1967-05-16
Abstract
No abstract record available.
Inventors
- 👤 Winston E Kock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:19
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/02; H01Q15/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US706739A
Cited
FR327312A
Cited
DE587771C
Cited
US2298272A
Cited
US2317464A
Cited
US2289735A
Cited
US2415807A
Cited
US2464269A
Cited
US2403657A
Cited
US2423643A
Cited
US2415352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |